$ git clone -n https://src.fedoraproject.org/rpms/ghc-OpenGL.git /var/lib/mock/f41-build-852548-166397/root/chroot_tmpdir/scmroot/ghc-OpenGL
Cloning into '/var/lib/mock/f41-build-852548-166397/root/chroot_tmpdir/scmroot/ghc-OpenGL'...
$ git fetch origin 137ad04ff994e6cd3f045fb2fc51a17ce07484f5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-OpenGL
 * [new ref]         137ad04ff994e6cd3f045fb2fc51a17ce07484f5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 137ad04 bump release