How do I undo this command? git reset HEAD~

 

To undo the command git reset HEAD~, you can use the git reflog command to find the previous state of your branch and then reset back to that state. Here's how to do it step by step with an example:

Suppose you have a Git history like this:

css

A --- B --- C (HEAD)
            |
            master

You ran git reset HEAD~ to unstage the last commit (commit C) and now want to undo it:

1. First, use git reflog to view the history of your branch and identify the commit you want to reset to. The git reflog command will display a list of recent actions on your branch.

   bash

git reflog

You'll see an output similar to:

less

c HEAD@{0}: reset: moving to HEAD~
b HEAD@{1}: commit: Commit message B
a HEAD@{2}: commit: Commit message A

In this example, you want to reset back to commit B (HEAD@{1}).

Reset your branch to the desired commit (commit B in this case) using git reset:

bash

2. git reset HEAD@{1}
   

   Replace HEAD@{1} with the appropriate reference from the git reflog output.

3. After running the reset command, your branch should be back to its previous state, and the changes from the last commit (commit C) will be unstaged. Commit C still exists in your Git history but is no longer part of your branch.

Your branch should now look like this:

css

A --- B (HEAD)
        |
        master

Your changes from commit C are now unstaged, and you can decide whether to modify them, commit them again, or discard them as needed.