$ git clone -n https://src.fedoraproject.org/rpms/rpy.git /var/lib/mock/f42-bootstrap-3462914-45593/root/chroot_tmpdir/scmroot/rpy
Cloning into '/var/lib/mock/f42-bootstrap-3462914-45593/root/chroot_tmpdir/scmroot/rpy'...
$ git fetch origin a73c71405bdf2bdb9ea4e3a6c8b7a2c557c4f700:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rpy
 * [new ref]         a73c71405bdf2bdb9ea4e3a6c8b7a2c557c4f700 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a73c714 Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild