$ git clone -n https://src.fedoraproject.org/rpms/ocaml-ppx-here.git /var/lib/mock/f41-build-838673-159749/root/chroot_tmpdir/scmroot/ocaml-ppx-here
Cloning into '/var/lib/mock/f41-build-838673-159749/root/chroot_tmpdir/scmroot/ocaml-ppx-here'...
$ git fetch origin 311aa8e75cd3339e2ec6f8a29abe9e1b0a5cb0bd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-ppx-here
 * [new ref]         311aa8e75cd3339e2ec6f8a29abe9e1b0a5cb0bd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 311aa8e Rebuild for ocaml-ppxlib 0.33.0