$ git clone -n https://src.fedoraproject.org/rpms/gh.git /var/lib/mock/f45-build-20002-565/root/chroot_tmpdir/scmroot/gh
Cloning into '/var/lib/mock/f45-build-20002-565/root/chroot_tmpdir/scmroot/gh'...
$ git fetch origin 5cd590721d7a37256edea2bd1541432c9cad45ee:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gh
 * [new ref]         5cd590721d7a37256edea2bd1541432c9cad45ee -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5cd5907 Update Packit config