https://bugs.winehq.org/show_bug.cgi?id=41450
--- Comment #7 from winetest@luukku.com --- Your patch needs author information and email.
Basically you just do
git reset --hard origin git pull make your code changes git commit -m "patch name" git format-patch -1
and you have a autogenerated patch that you need to send over. With sign off message.
I quess you have generated the patch just correctly I just didnt notice the line starting with diff.
You could add patch keyword into this bug report.