$ git clone -n https://src.fedoraproject.org/rpms/ocaml-ppx-hash.git /var/lib/mock/f42-build-865806-173520/root/chroot_tmpdir/scmroot/ocaml-ppx-hash
Cloning into '/var/lib/mock/f42-build-865806-173520/root/chroot_tmpdir/scmroot/ocaml-ppx-hash'...
$ git fetch origin f2471042194e6907871c03e203cfd70feb5f25a3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-ppx-hash
 * [new ref]         f2471042194e6907871c03e203cfd70feb5f25a3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f247104 OCaml 5.3.0 rebuild for Fedora 42