$ git clone -n https://src.fedoraproject.org/rpms/mlpack.git /var/lib/mock/f40-build-2417475-60573/root/chroot_tmpdir/scmroot/mlpack
Cloning into '/var/lib/mock/f40-build-2417475-60573/root/chroot_tmpdir/scmroot/mlpack'...
$ git fetch origin b73e1e92640dc1b0dd1a326474ce74125ce349b2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mlpack
 * [new ref]         b73e1e92640dc1b0dd1a326474ce74125ce349b2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b73e1e9 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild