$ git clone -n https://src.fedoraproject.org/rpms/ocaml-ocamlbuild.git /var/lib/mock/f40-build-2013454-45886/root/chroot_tmpdir/scmroot/ocaml-ocamlbuild
Cloning into '/var/lib/mock/f40-build-2013454-45886/root/chroot_tmpdir/scmroot/ocaml-ocamlbuild'...
$ git fetch origin dc531ff34258559d1ae7254b7de1f4ba8fef8df1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-ocamlbuild
 * [new ref]         dc531ff34258559d1ae7254b7de1f4ba8fef8df1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dc531ff OCaml 5.1.1 rebuild for Fedora 40