$ git clone -n https://src.fedoraproject.org/rpms/ocaml-trie.git /var/lib/mock/f42-build-865569-173304/root/chroot_tmpdir/scmroot/ocaml-trie
Cloning into '/var/lib/mock/f42-build-865569-173304/root/chroot_tmpdir/scmroot/ocaml-trie'...
$ git fetch origin 2a16b123e8488774f475db3a45edf7992dcb35c6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-trie
 * [new ref]         2a16b123e8488774f475db3a45edf7992dcb35c6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2a16b12 OCaml 5.3.0 rebuild for Fedora 42