Recovering from bad rebase in Git - Step-by-Step Execution

Process Flow - Recovering from bad rebase

Start bad rebase

↓

Detect problem

↓

Check reflog for previous state

↓

Reset branch to safe commit

↓

Verify branch state

↓

Continue work or rebase again

This flow shows how to detect a bad rebase, find a safe commit using reflog, reset the branch to that commit, and verify recovery.

Execution Sample

Git

git reflog
# find commit before bad rebase

git reset --hard <commit>
# reset branch to safe commit

git status
# verify branch state

This sequence recovers a branch after a bad rebase by using reflog to find a safe commit and resetting the branch to it.

Process Table

Step	Command	Action	Result
1	git rebase feature	Start rebase onto feature branch	Rebase starts, conflicts or errors may occur
2	Detect problem	Notice conflicts or wrong history	Realize rebase was bad
3	git reflog	List recent HEAD changes	Shows commits before rebase
4	Identify safe commit	Pick commit before rebase started	Commit hash found
5	git reset --hard <commit>	Reset branch to safe commit	Branch state restored to before rebase
6	git status	Check current branch status	Clean working directory, branch recovered
7	End	Recovery complete	Ready to continue work or retry rebase

💡 Recovery stops after resetting branch to safe commit and verifying clean state

Status Tracker

Variable	Start	After Step 3	After Step 5	Final
HEAD	points to pre-rebase commit	shows reflog entries including pre-rebase commit	points to reset commit before rebase	points to safe commit, branch recovered
Working Directory	clean	unchanged	reset to commit state	clean

Key Moments - 3 Insights

Why do we use 'git reflog' after a bad rebase?

Because 'git reflog' shows the history of HEAD movements, allowing us to find the commit before the bad rebase as shown in step 3 of the execution_table.

What does 'git reset --hard <commit>' do in recovery?

It moves the branch pointer and working directory back to the safe commit, undoing the bad rebase changes as shown in step 5.

Why check 'git status' after resetting?

To confirm the working directory is clean and the branch is correctly restored, as shown in step 6.

Visual Quiz - 3 Questions

Look at the execution_table, what command lists recent HEAD changes?

A git status

B git reset --hard

C git reflog

D git rebase

💡 Hint

Refer to step 3 in the execution_table where the command lists recent HEAD changes.

At which step does the branch pointer move back to a safe commit?

A Step 2

B Step 5

C Step 4

D Step 6

💡 Hint

Step 5 shows the 'git reset --hard ' command that resets the branch.

If you skip 'git reflog', what problem will you face?

A Cannot find the commit before bad rebase

B Working directory will be dirty

C Branch will be deleted

D Rebase will continue automatically

💡 Hint

Refer to step 3 and 4 where reflog helps identify the safe commit.

Concept Snapshot

Recovering from bad rebase:
1. Use 'git reflog' to find commit before bad rebase.
2. Run 'git reset --hard <commit>' to restore branch.
3. Verify with 'git status' for clean state.
This safely undoes a bad rebase without losing work.

Full Transcript

When you do a bad rebase in git, you can fix it by using 'git reflog' to see where your branch was before the rebase. Then, use 'git reset --hard' with the commit hash from reflog to move your branch back to that safe point. Finally, check with 'git status' to make sure your working directory is clean and your branch is restored. This process helps you recover without losing your work.

Practice

1. What is the safest way to stop a rebase process if you realize it is going wrong?

easy

A. Use git rebase --abort to cancel the rebase

B. Use git reset --hard HEAD to cancel the rebase

C. Use git commit --amend to fix the rebase

D. Use git push --force to undo the rebase

Solution

1. Step 1: Understand the rebase abort command

   The command git rebase --abort safely stops and cancels the ongoing rebase process, restoring the branch to its original state before the rebase started.

2. Step 2: Compare with other commands

   Other commands like git reset --hard HEAD or git commit --amend do not cancel a rebase safely. git push --force is for pushing changes, not aborting rebase.

3. Final Answer:

   Use git rebase --abort to cancel the rebase -> Option A

4. Quick Check:

   Cancel rebase safely = git rebase --abort [OK]

Hint: Abort rebase with git rebase --abort to safely cancel [OK]

Common Mistakes:

• Using git reset --hard HEAD which may lose changes
• Trying to amend commits during rebase to fix errors
• Forcing push without fixing rebase issues

2. Which of the following commands correctly shows the history of recent HEAD positions to help recover from a bad rebase?

easy

A. git reflog

B. git branch -a

C. git status

D. git log --oneline

Solution

1. Step 1: Identify the command to view HEAD history

   git reflog shows a log of where HEAD and branches have pointed recently, including before and after rebases.

2. Step 2: Understand why other commands don't help here

   git log --oneline shows commit history but not HEAD movements. git status shows current state. git branch -a lists branches.

3. Final Answer:

   git reflog -> Option A

4. Quick Check:

   View HEAD history = git reflog [OK]

Hint: Use git reflog to find commits before rebase [OK]

Common Mistakes:

• Using git log which doesn't show HEAD moves
• Confusing git status with reflog
• Looking at branches instead of commit history

3. After a bad rebase, you find the commit hash abc1234 from git reflog. What does the command git reset --hard abc1234 do?

medium

A. Creates a new branch at commit abc1234

B. Moves the current branch to commit abc1234 and discards all changes after it

C. Starts a new rebase from commit abc1234

D. Shows the differences between HEAD and abc1234

Solution

1. Step 1: Understand git reset --hard with a commit

   The command git reset --hard abc1234 moves the current branch pointer to the commit abc1234 and resets the working directory and index to match that commit, discarding any changes after it.

2. Step 2: Clarify what the other options do not do

   This command does not create a new branch, start a rebase, or show differences. It forcibly resets the branch state.

3. Final Answer:

   Moves branch to abc1234 and discards later changes -> Option B

4. Quick Check:

   Reset hard to commit = move branch and discard changes [OK]

Hint: Reset hard to commit to undo bad rebase changes [OK]

Common Mistakes:

• Thinking reset creates a new branch
• Confusing reset with diff or rebase commands
• Using reset without knowing it discards changes

4. You started a rebase but got conflicts and want to cancel it. You run git reset --hard HEAD instead of git rebase --abort. What is the likely result?

medium

A. The rebase is safely canceled and branch restored

B. The rebase continues but changes are lost

C. The working directory resets but rebase metadata remains, causing issues

D. Git shows an error and stops

Solution

1. Step 1: Understand difference between reset and rebase abort

   git reset --hard HEAD resets files but does not clear rebase state files, so the rebase process is still active.

2. Step 2: Consequence of not aborting rebase properly

   This causes Git to think rebase is ongoing, leading to confusion and possible errors until git rebase --abort is run.

3. Final Answer:

   Working directory resets but rebase metadata remains, causing issues -> Option C

4. Quick Check:

   Reset hard ≠ abort rebase; rebase metadata stays [OK]

Hint: Always use git rebase --abort to cancel rebase, not reset [OK]

Common Mistakes:

• Using reset hard to cancel rebase
• Assuming reset clears rebase state
• Ignoring rebase metadata files causing errors

5. You performed a bad rebase and want to recover your branch to the state before the rebase started. Which sequence of commands correctly recovers your branch?

hard

A. git checkout master -> git merge --abort

B. git reset --hard HEAD~1 -> git rebase --abort

C. git rebase --continue -> git reset --soft HEAD~1

D. git reflog -> find commit before rebase -> git reset --hard <commit>

Solution

1. Step 1: Use git reflog to find the commit before the bad rebase

   git reflog lists recent HEAD positions, so you can identify the commit hash before the rebase started.

2. Step 2: Reset branch to that commit to undo the bad rebase

   Using git reset --hard <commit> moves the branch pointer back and resets files to that safe commit, effectively undoing the bad rebase.

3. Final Answer:

   git reflog -> find commit before rebase -> git reset --hard <commit> -> Option D

4. Quick Check:

   Recover bad rebase = reflog + reset hard [OK]

Hint: Find pre-rebase commit with reflog, then reset hard to it [OK]

Common Mistakes:

• Trying to abort after rebase finished
• Using reset soft which keeps changes
• Confusing merge abort with rebase abort