// Git revision range syntax is part of git, not the shell; pass as-is.
        return getStdoutLines(new String[] {"git", "diff", "--name-only", commit + "^1.." + commit});
    }

    private static List<String> branchesOf(String commit) throws IOException, InterruptedException, ExecutionException {
        List<String> lines = getStdoutLines(new String[] {"git", "branch", "-r", "--contains", commit});