$ git clone -n https://src.fedoraproject.org/rpms/tracer.git /var/lib/mock/f40-build-2646688-66644/root/chroot_tmpdir/scmroot/tracer
Cloning into '/var/lib/mock/f40-build-2646688-66644/root/chroot_tmpdir/scmroot/tracer'...
$ git fetch origin bf3046c39d24deda7d6fa7a8c122c69bc4df5906:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/tracer
 * [new ref]         bf3046c39d24deda7d6fa7a8c122c69bc4df5906 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bf3046c Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild