$ git clone -n https://src.fedoraproject.org/rpms/ocaml-obuild.git /var/lib/mock/f40-build-2013451-45885/root/chroot_tmpdir/scmroot/ocaml-obuild
Cloning into '/var/lib/mock/f40-build-2013451-45885/root/chroot_tmpdir/scmroot/ocaml-obuild'...
$ git fetch origin d7fbf102e4df5cd318d49cb26e88fb0ae5b2b5f3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-obuild
 * [new ref]         d7fbf102e4df5cd318d49cb26e88fb0ae5b2b5f3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d7fbf10 OCaml 5.1.1 rebuild for Fedora 40