To undo the last commit but keep the changes, run the following command:

git reset --soft HEAD~1    

Now when we run git status, we will see that all of our changes are in staging. When we run git log, we can see that our commit has been removed.

If we want to completely remove changes in staging, we can run the following command:

git reset --hard HEAD

These are dangerous commands and should be used with caution. Try it out on a different branch first. However, in the worst case scenario, we can recover commits we accidentally deleted with git reflog.