$ git clone -n https://src.fedoraproject.org/rpms/ghc-OpenGLRaw.git /var/lib/mock/f41-build-837911-159471/root/chroot_tmpdir/scmroot/ghc-OpenGLRaw
Cloning into '/var/lib/mock/f41-build-837911-159471/root/chroot_tmpdir/scmroot/ghc-OpenGLRaw'...
$ git fetch origin 65b6c2d798997adb262afacdbd23014e3585aa22:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-OpenGLRaw
 * [new ref]         65b6c2d798997adb262afacdbd23014e3585aa22 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 65b6c2d bump release