$ git clone -n https://src.fedoraproject.org/rpms/ocaml-sexplib0.git /var/lib/mock/f42-build-865561-173304/root/chroot_tmpdir/scmroot/ocaml-sexplib0
Cloning into '/var/lib/mock/f42-build-865561-173304/root/chroot_tmpdir/scmroot/ocaml-sexplib0'...
$ git fetch origin 2651f44812c71a26b4acd7c4a325d93639f9a88a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-sexplib0
 * [new ref]         2651f44812c71a26b4acd7c4a325d93639f9a88a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2651f44 OCaml 5.3.0 rebuild for Fedora 42