$ git clone -n https://src.fedoraproject.org/rpms/ocaml-opam-file-format.git /var/lib/mock/f42-build-865734-173451/root/chroot_tmpdir/scmroot/ocaml-opam-file-format
Cloning into '/var/lib/mock/f42-build-865734-173451/root/chroot_tmpdir/scmroot/ocaml-opam-file-format'...
$ git fetch origin 0b4e2bd093f5434d07f2a9c0e791a2f0e3efb58e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-opam-file-format
 * [new ref]         0b4e2bd093f5434d07f2a9c0e791a2f0e3efb58e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0b4e2bd OCaml 5.3.0 rebuild for Fedora 42