$ git clone -n https://src.fedoraproject.org/rpms/arj.git /var/lib/mock/f42-build-3273291-41310/root/chroot_tmpdir/scmroot/arj
Cloning into '/var/lib/mock/f42-build-3273291-41310/root/chroot_tmpdir/scmroot/arj'...
$ git fetch origin 66f4e5cd10cd6ffcf28abaa86f62949688cd6646:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/arj
 * [new ref]         66f4e5cd10cd6ffcf28abaa86f62949688cd6646 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 66f4e5c Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild