anchor.diff:    ///
     /// Throws [VersionCheckError] if a git command fails, for example, when the
     /// remote git repository is not reachable due to a network issue.
  -  static Future<String> fetchRemoteFrameworkCommitDate(String branch) async {
  +  static Future<String> fetchRemoteFrameworkCommitDate() async {
       try {
         // Fetch upstream branch's commit and tags
         await _run(<String>['git', 'fetch', '--tags']);
  
positive.code: 
    /// Execute validations and print warning to [logger] if necessary.
    Future<void> run() async {
      // Don't perform update checks if we're not on an official channel.
      if (!kOfficialChannels.contains(version.channel)) {
        return;
      }
  
      // Get whether there's a newer version on the remote. This only goes
      // to the server if we haven't checked recently so won't happen on every
      // command.
  
negative.code:     // Cache is empty or it's been a while since the last server ping. Ping the server.
      try {
        final DateTime remoteFrameworkCommitDate = DateTime.parse(
          await FlutterVersion.fetchRemoteFrameworkCommitDate(),
        );
        await versionCheckStamp.store(
          newTimeVersionWasChecked: now,
  