https://bugs.winehq.org/show_bug.cgi?id=48965
--- Comment #9 from Marko Friedemann mfr@bmx-chemnitz.de --- It's actually two patches to help with fullscreen mode.
One is "winex11.drv: Bypass compositor in fullscreen mode", from Kai Krakow. The other is a patch named compiz-workaround, which gets rid of Unity's stupid global menu.
Both are patches to winex11.drv/window.c, the first adds a XChangeProperty call, the second one removes one (I'll attach both for reference).
I am using an old Ubuntu 16.04 LTS (yes, I know), with its Unity desktop, wmctrl -m says the WM is compiz, which would make sense given the 2nd patch name (can't remember where I fetched that from).
HTH, M.