https://bugs.winehq.org/show_bug.cgi?id=44504
--- Comment #14 from Henri Verbeet hverbeet@gmail.com --- (In reply to Zebediah Figura from comment #13)
You have to use `patch < diff.file`, with the left angle bracket. 'patch' reads from stdin, not its first argument.
Actually, I'd recommend against using "patch" with git, and instead recommend using "git apply".