$ git clone -n https://src.fedoraproject.org/rpms/ocaml-ppx-hash.git /var/lib/mock/f40-build-784185-133259/root/chroot_tmpdir/scmroot/ocaml-ppx-hash
Cloning into '/var/lib/mock/f40-build-784185-133259/root/chroot_tmpdir/scmroot/ocaml-ppx-hash'...
$ git fetch origin 1d309a56290117ca107d1f328c0c177a11825ae8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-ppx-hash
 * [new ref]         1d309a56290117ca107d1f328c0c177a11825ae8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1d309a5 Rebuild for changed ocamlx hashes