{ "source_policy": "dockerfile_fetch_historyless_base_snapshot", "base_commit": "12424cdf2fda068e973ebd89cda045fee297943a", "repo": "apache/arrow", "note": "The generated Dockerfile fetches the base commit with ancestor history, preserves .git, removes post-base refs/remotes/reflogs, and prunes unreachable future commit objects during image build." }