$ git clone -n https://src.fedoraproject.org/rpms/bes.git /var/lib/mock/f39-build-1922027-42961/root/chroot_tmpdir/scmroot/bes
Cloning into '/var/lib/mock/f39-build-1922027-42961/root/chroot_tmpdir/scmroot/bes'...
$ git fetch origin be43bb3031ad8141b53c7e3169c3d44be99893b8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/bes
 * [new ref]         be43bb3031ad8141b53c7e3169c3d44be99893b8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at be43bb3 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild