$ git clone -n https://src.fedoraproject.org/rpms/ocaml-yojson.git /var/lib/mock/f42-build-866024-173661/root/chroot_tmpdir/scmroot/ocaml-yojson
Cloning into '/var/lib/mock/f42-build-866024-173661/root/chroot_tmpdir/scmroot/ocaml-yojson'...
$ git fetch origin 933a22437201342655e31d04a1d1695927c1daf9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-yojson
 * [new ref]         933a22437201342655e31d04a1d1695927c1daf9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 933a224 OCaml 5.3.0 rebuild for Fedora 42