$ git clone -n https://src.fedoraproject.org/rpms/ocaml-ppx-compare.git /var/lib/mock/f40-build-784000-133236/root/chroot_tmpdir/scmroot/ocaml-ppx-compare
Cloning into '/var/lib/mock/f40-build-784000-133236/root/chroot_tmpdir/scmroot/ocaml-ppx-compare'...
$ git fetch origin e1fc22c38d0d6797e1a86c312bc3fa9b32cb18d4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-ppx-compare
 * [new ref]         e1fc22c38d0d6797e1a86c312bc3fa9b32cb18d4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e1fc22c Rebuild for changed ocamlx hashes