$ git clone -n https://src.fedoraproject.org/rpms/ocaml-ppxlib.git /var/lib/mock/f40-build-2013486-45891/root/chroot_tmpdir/scmroot/ocaml-ppxlib
Cloning into '/var/lib/mock/f40-build-2013486-45891/root/chroot_tmpdir/scmroot/ocaml-ppxlib'...
$ git fetch origin 7c77fd5e2b9f3412962539a2a270f68ea1770aad:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-ppxlib
 * [new ref]         7c77fd5e2b9f3412962539a2a270f68ea1770aad -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7c77fd5 OCaml 5.1.1 rebuild for Fedora 40