code: function copy(existingName, newName, cb) {
    var opts = {
      mode: 'copy',
      from: existingName,
      contentType: 'text/plain',
    };
    this.remoteAccessApi.postCreateItem(newName, _.merge(opts, this.opts.headers), cb);
  }
docs: Copy an existing job into a new job.
  
  @param {String} existingName: existing Jenkins job name to copy from
  @param {String} newName: new Jenkins job name to copy to
  @param {Function} cb: standard cb(err, result) callback