$ git clone -n https://src.fedoraproject.org/rpms/ocaml-cryptokit.git /var/lib/mock/f42-build-865611-173358/root/chroot_tmpdir/scmroot/ocaml-cryptokit
Cloning into '/var/lib/mock/f42-build-865611-173358/root/chroot_tmpdir/scmroot/ocaml-cryptokit'...
$ git fetch origin 1d5ac65fb5238ff3841ed9434f74abd785343cd2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-cryptokit
 * [new ref]         1d5ac65fb5238ff3841ed9434f74abd785343cd2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1d5ac65 OCaml 5.3.0 rebuild for Fedora 42