$ git clone -n https://src.fedoraproject.org/rpms/ocaml-yojson.git /var/lib/mock/f42-build-3340375-44984/root/chroot_tmpdir/scmroot/ocaml-yojson
Cloning into '/var/lib/mock/f42-build-3340375-44984/root/chroot_tmpdir/scmroot/ocaml-yojson'...
$ git fetch origin b266d839c57c7170c8f68791dba77041b9bbaa95:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-yojson
 * [new ref]         b266d839c57c7170c8f68791dba77041b9bbaa95 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b266d83 Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild