$ git clone -n https://src.fedoraproject.org/rpms/rarpd.git /var/lib/mock/f41-build-700865-12894/root/chroot_tmpdir/scmroot/rarpd
Cloning into '/var/lib/mock/f41-build-700865-12894/root/chroot_tmpdir/scmroot/rarpd'...
$ git fetch origin 8ff9fbffeaae0b244a693d502bddbc4d2b4630da:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rarpd
 * [new ref]         8ff9fbffeaae0b244a693d502bddbc4d2b4630da -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8ff9fbf Eliminate use of obsolete %patchN syntax (#2283636)