You can tell if a commit has made it to a release just by looking up at the top.
This only says "master" so that means it does not exist in a release yet.
When it says "master" and lists some versions beside it, then that means it's in a release.
The commit that Graf linked is only 2 days old - and the last released happened long before that, so there's no way it could possibly be in a release just yet.
But this site might sometimes have a build you can use right away:
https://devbuilds.drdteam.org/raze/
This commit, for example, actually appears in a release:
https://github.com/ZDoom/Raze/commit/39 ... 6db1f6059d
