$ git clone -n https://src.fedoraproject.org/rpms/robin-map.git /var/lib/mock/f45-build-34559-688/root/chroot_tmpdir/scmroot/robin-map
Cloning into '/var/lib/mock/f45-build-34559-688/root/chroot_tmpdir/scmroot/robin-map'...
$ git fetch origin 0021604035955ad8afd8991253ec08d8be541bb8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/robin-map
 * [new ref]         0021604035955ad8afd8991253ec08d8be541bb8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0021604 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild