code: function getCommitDate() {
      const deferred = q.defer();
  
      exec('git show -s --format=%ci HEAD', function(error, stdout) {
        buildConfig.date = stdout && stdout.toString().trim();
        deferred.resolve(buildConfig.date);
      });
  
      return deferred.promise;
    }
docs: Get the commit date for the most recent commit on origin/master
  @returns {*}