$ git clone -n https://src.fedoraproject.org/rpms/planets.git /var/lib/mock/f42-build-866017-173661/root/chroot_tmpdir/scmroot/planets
Cloning into '/var/lib/mock/f42-build-866017-173661/root/chroot_tmpdir/scmroot/planets'...
$ git fetch origin 1314fb2a3b7cd47b1c22bade0e09a5b481f6b819:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/planets
 * [new ref]         1314fb2a3b7cd47b1c22bade0e09a5b481f6b819 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1314fb2 OCaml 5.3.0 rebuild for Fedora 42