remote_islands = kh_init_str();
git_config(island_config_callback, NULL);
for_each_ref(find_island_for_ref, NULL);
deduplicate_islands(r);
remote_islands = kh_init_str();
git_config(island_config_callback, NULL);
for_each_ref(find_island_for_ref, NULL);
deduplicate_islands(r);