"Still uses CVS", I mean, CVS worked twenty years ago and it still works today for all the platforms OpenBSD supports. If you prefer something else, that is all right, but here is emulators/wine on CVSWeb:
They mirror to GitHub regularly, but development still happens in CVS. They are building “got” as a potential replacement that allows git-driven development while following OpenBSD’s idiosyncratic approach: https://gameoftrees.org/goals.html
My guess is they based this on the similar NetBSD port but I don’t know where the repo is.