$ git clone -n https://src.fedoraproject.org/rpms/unicornscan.git /var/lib/mock/f39-build-2546987-61806/root/chroot_tmpdir/scmroot/unicornscan
Cloning into '/var/lib/mock/f39-build-2546987-61806/root/chroot_tmpdir/scmroot/unicornscan'...
$ git fetch origin a1a359d7e56b304c24023b14f49332b693ce79c2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/unicornscan
 * [new ref]         a1a359d7e56b304c24023b14f49332b693ce79c2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a1a359d Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild