$ git clone -n https://src.fedoraproject.org/rpms/ocaml-ptime.git /var/lib/mock/f42-build-865634-173376/root/chroot_tmpdir/scmroot/ocaml-ptime
Cloning into '/var/lib/mock/f42-build-865634-173376/root/chroot_tmpdir/scmroot/ocaml-ptime'...
$ git fetch origin 9fbe5ebbe3bdb0843b524728f14a803513d652ba:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-ptime
 * [new ref]         9fbe5ebbe3bdb0843b524728f14a803513d652ba -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9fbe5eb OCaml 5.3.0 rebuild for Fedora 42