$ git clone -n https://src.fedoraproject.org/rpms/miller.git /var/lib/mock/f41-build-3151176-40566/root/chroot_tmpdir/scmroot/miller
Cloning into '/var/lib/mock/f41-build-3151176-40566/root/chroot_tmpdir/scmroot/miller'...
$ git fetch origin 3ac7bde0cae4c58b91305699e758d77624e4a525:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/miller
 * [new ref]         3ac7bde0cae4c58b91305699e758d77624e4a525 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3ac7bde Update to version 6.13.0