hg does and I think git should do it as well. `hg revert file.py` creates a file.py.orig where file.py is being reverted. It does creates an extra file which yo

hg does and I think git should do it as well. `hg revert file.py` creates a file.py.orig where file.py is being reverted. It does creates an extra file which you don't want but it's better in the cases where you accidentally reverted. `hg purge` purges all files not tracked by mercurial and `hg rever --no-backup file.py` can be used when you don't want backup. Considering its usefulness, I am happy to put up with untracked, original file it creates which I don't need most of the times; but boy is it a lifesaver when I do need it.