$ git clone -n https://src.fedoraproject.org/rpms/ocaml-ppx-compare.git /var/lib/mock/f41-build-side-1-3055158-38325/root/chroot_tmpdir/scmroot/ocaml-ppx-compare
Cloning into '/var/lib/mock/f41-build-side-1-3055158-38325/root/chroot_tmpdir/scmroot/ocaml-ppx-compare'...
$ git fetch origin 747dc50dcecfb895d2cb229e6ed65f90399a3e9a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-ppx-compare
 * [new ref]         747dc50dcecfb895d2cb229e6ed65f90399a3e9a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 747dc50 Rebuild for ocaml-ppxlib 0.33.0