Move (or "Undo") last git commit to unstaged area

What's the best way to move your last git commit back into the "Changes not staged" + "Untracked files" areas (with the commit in question being not-pushed / only in your local repo, effectively removing it from HEAD)?

In other words, how do you roll back a commit, but automatically apply that diff to your unstaged area?

You can use git reset to set the current branch to the preceding commit, i.e. HEAD^

git reset HEAD^

Adding --soft will keep those files in the index: (ready to be committed)

git reset --soft HEAD^

> --soft > > (…) This leaves all your changed files "Changes to be committed", as git status would put it.

git-extras provides a git undo command which is an easier to remember way of doing the same thing (along with a number of other handy extras, as the name implies).