$ git clone -n https://src.fedoraproject.org/rpms/lammps.git /var/lib/mock/f38-build-side-42-init-devel-694409-26969/root/chroot_tmpdir/scmroot/lammps
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-694409-26969/root/chroot_tmpdir/scmroot/lammps'...
$ git fetch origin e45ea5f400a0f8942acf206f7d93364e9fccf130:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/lammps
 * [new ref]         e45ea5f400a0f8942acf206f7d93364e9fccf130 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e45ea5f Disable one more test