Git Messes

gistfile1.txt

What command do you run if you want to discard all changes since your last commit?
git stash

What command do you use if you run git add and then want to revert it?
git reset

What command do you use if you run git commit and then want to revert it?
git checkout **previous commit id**
that other command that fixes detached head mode that I always have to google.

What command do you use if you run git push and then want to revert it?
git cry