$ git clone -n https://src.fedoraproject.org/rpms/ocaml-fieldslib.git /var/lib/mock/f42-build-865649-173376/root/chroot_tmpdir/scmroot/ocaml-fieldslib
Cloning into '/var/lib/mock/f42-build-865649-173376/root/chroot_tmpdir/scmroot/ocaml-fieldslib'...
$ git fetch origin 66de2716c0787ca6675364439469294facb1281a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-fieldslib
 * [new ref]         66de2716c0787ca6675364439469294facb1281a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 66de271 OCaml 5.3.0 rebuild for Fedora 42