$ git clone -n https://src.fedoraproject.org/rpms/ghc-OpenGLRaw.git /var/lib/mock/f45-build-9930-411/root/chroot_tmpdir/scmroot/ghc-OpenGLRaw
Cloning into '/var/lib/mock/f45-build-9930-411/root/chroot_tmpdir/scmroot/ghc-OpenGLRaw'...
$ git fetch origin 8af4c8072a8d263e366895fba79c03f3fc4f7d71:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-OpenGLRaw
 * [new ref]         8af4c8072a8d263e366895fba79c03f3fc4f7d71 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8af4c80 avoid using more than 64 cores