$ git clone -n https://src.fedoraproject.org/rpms/tellico.git /var/lib/mock/f40-build-2309450-57351/root/chroot_tmpdir/scmroot/tellico
Cloning into '/var/lib/mock/f40-build-2309450-57351/root/chroot_tmpdir/scmroot/tellico'...
$ git fetch origin b6aa43538cd90909c8b75aa975bf18b08b5800d9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/tellico
 * [new ref]         b6aa43538cd90909c8b75aa975bf18b08b5800d9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b6aa435 Rebuild for libksane bump