$ git clone -n https://src.fedoraproject.org/rpms/rundoc.git /var/lib/mock/f45-build-35468-695/root/chroot_tmpdir/scmroot/rundoc
Cloning into '/var/lib/mock/f45-build-35468-695/root/chroot_tmpdir/scmroot/rundoc'...
$ git fetch origin 6cd3bb01e40d2aa91971ca968411c880d0760367:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rundoc
 * [new ref]         6cd3bb01e40d2aa91971ca968411c880d0760367 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6cd3bb0 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild