$ git clone -n https://src.fedoraproject.org/rpms/ocaml-yaml.git /var/lib/mock/f42-build-865967-173613/root/chroot_tmpdir/scmroot/ocaml-yaml
Cloning into '/var/lib/mock/f42-build-865967-173613/root/chroot_tmpdir/scmroot/ocaml-yaml'...
$ git fetch origin 0fe6c92cbe562b6f2b80cc55d9fcf83e33ef80b7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-yaml
 * [new ref]         0fe6c92cbe562b6f2b80cc55d9fcf83e33ef80b7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0fe6c92 OCaml 5.3.0 rebuild for Fedora 42