$ git clone -n https://src.fedoraproject.org/rpms/ghc-graphviz.git /var/lib/mock/f40-build-743779-111387/root/chroot_tmpdir/scmroot/ghc-graphviz
Cloning into '/var/lib/mock/f40-build-743779-111387/root/chroot_tmpdir/scmroot/ghc-graphviz'...
$ git fetch origin a4a02f0fc3b2cdaa337fd4b9218659885618e34b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-graphviz
 * [new ref]         a4a02f0fc3b2cdaa337fd4b9218659885618e34b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a4a02f0 bump release