public GitWrapper(ExecOperations execOperations) {
        this.execOperations = execOperations;
    }

    /**
     * @return a mapping from remote names to remote URLs.
     */
    public Map<String, String> listRemotes() {
        return runCommand("git", "remote", "-v").lines()
            .filter(l -> l.contains("(fetch)"))
            .map(line -> line.split("\\s+"))