$ git clone -n https://src.fedoraproject.org/forks/u2fsdgvkx1/rpms/redhat-rpm-config.git /var/lib/mock/f45-build-56-13/root/chroot_tmpdir/scmroot/redhat-rpm-config
Cloning into '/var/lib/mock/f45-build-56-13/root/chroot_tmpdir/scmroot/redhat-rpm-config'...
$ git fetch origin c0c550b382436b68e632eda58ddd780426537397:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/forks/u2fsdgvkx1/rpms/redhat-rpm-config
 * [new ref]         c0c550b382436b68e632eda58ddd780426537397 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c0c550b add RVA23 support