$ git clone -n https://src.fedoraproject.org/rpms/ghc-fclabels.git /var/lib/mock/f40-build-744367-111705/root/chroot_tmpdir/scmroot/ghc-fclabels
Cloning into '/var/lib/mock/f40-build-744367-111705/root/chroot_tmpdir/scmroot/ghc-fclabels'...
$ git fetch origin d83256eb3c6a1a614369609fa960ea4d6588c498:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-fclabels
 * [new ref]         d83256eb3c6a1a614369609fa960ea4d6588c498 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d83256e bump upperbounds