$ git clone -n https://src.fedoraproject.org/rpms/ocaml-react.git /var/lib/mock/f42-build-865635-173376/root/chroot_tmpdir/scmroot/ocaml-react
Cloning into '/var/lib/mock/f42-build-865635-173376/root/chroot_tmpdir/scmroot/ocaml-react'...
$ git fetch origin 412dba5f7ab5478cbe3309516ded47a41c453a87:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-react
 * [new ref]         412dba5f7ab5478cbe3309516ded47a41c453a87 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 412dba5 OCaml 5.3.0 rebuild for Fedora 42