$ git clone -n https://src.fedoraproject.org/rpms/rubygem-parse-cron.git /var/lib/mock/f40-build-2034080-47865/root/chroot_tmpdir/scmroot/rubygem-parse-cron
Cloning into '/var/lib/mock/f40-build-2034080-47865/root/chroot_tmpdir/scmroot/rubygem-parse-cron'...
$ git fetch origin df230fd7293e534ac975bdd85d83af82e307a3e0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-parse-cron
 * [new ref]         df230fd7293e534ac975bdd85d83af82e307a3e0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at df230fd Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild