How to undo the last commit and discard the changes?

git reset --hard HEAD~1

To undo the last commit and discard the changes use git reset --hard HEAD~1.

The reset command resets your current HEAD to a specific commit, without creating a new commit for the revert.

The --hard flag discards your reverted changes.

The HEAD~1 tells reset to go back 1 commit from your current state.

git status

On branch main

nothing to commit, working tree clean

git reset --hard HEAD~1

HEAD is now at 9cfff18 Adding file.txt

git status

On branch main

nothing to commit, working tree clean

See git reset to learn more about it.