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.

Edit: sibling commenter found it

The GitHub mirror of the equivalent NetBSD package is here [1].

[1] https://github.com/NetBSD/pkgsrc/tree/trunk/emulators/wine