$ git clone -n https://src.fedoraproject.org/rpms/rubygem-narray.git /var/lib/mock/f40-build-733975-105626/root/chroot_tmpdir/scmroot/rubygem-narray
Cloning into '/var/lib/mock/f40-build-733975-105626/root/chroot_tmpdir/scmroot/rubygem-narray'...
$ git fetch origin 1f0af0fd470909ac612952281e4718ea48e277bc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-narray
 * [new ref]         1f0af0fd470909ac612952281e4718ea48e277bc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1f0af0f Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild