$ git clone -n https://src.fedoraproject.org/rpms/planets.git /var/lib/mock/f40-build-2023584-46915/root/chroot_tmpdir/scmroot/planets
Cloning into '/var/lib/mock/f40-build-2023584-46915/root/chroot_tmpdir/scmroot/planets'...
$ git fetch origin 9b8af5d93a03c1a0b31a02fb9d463c01d451ca0c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/planets
 * [new ref]         9b8af5d93a03c1a0b31a02fb9d463c01d451ca0c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9b8af5d OCaml 5.1.1 rebuild for Fedora 40