How to Reintroduce a Previously Undone Commit with Git?

When you need to reintroduce a commit that was undone, you can use Git. This situation typically occurs after using the git reset command, where you want to reintroduce certain commits to the branch. Here are the steps and examples:

Step 1: Find the hash of the undone commit

First, you need to find the hash of the commit you want to reintroduce. You can use the git reflog command to view your Git operation history and identify the hash of the commit you want to reintroduce.

bash
git reflog

You will see output similar to this:

shell
1a410ef HEAD@{1}: reset: moving to HEAD~1
abcd123 HEAD@{2}: commit: Added a new feature

Assume abcd123 is the commit you want to reintroduce.

Step 2: Use the git cherry-pick command to reintroduce the commit

Now, use the git cherry-pick command to apply that commit. This command will reintroduce the specified commit to the current branch.

bash
git cherry-pick abcd123

Example

Suppose I previously made a feature commit, but later, due to some reason, used the git reset --hard HEAD~1 command to remove the commit from the branch. Now I want to reintroduce that commit.

1. I first view the reflog to find the hash of that commit:

   bash
   

git reflog

shell

   The output might be:

1a410ef HEAD@{1}: reset: moving to HEAD~1 abcd123 HEAD@{2}: commit: Added a new feature

shell

2. Use `git cherry-pick` to reintroduce the commit:

   ```bash
git cherry-pick abcd123

This will reapply the changes from abcd123 to the current branch.

Notes

• If conflicts occur during cherry-pick, you need to manually resolve them, mark the resolved files with git add, and then run git cherry-pick --continue to complete the operation.
• When using git cherry-pick, ensure your working directory is clean, i.e., no uncommitted changes.

This is how you use Git to reintroduce a previously undone commit.