style.php

<?php
/**-------------------------------------------
* @package Code Snippets
* @link http://rhythmshahriar.com/code/
* @author Rhythm <[email protected]>
* @copyright Copyright (c) 2013, Rhythm Shahriar
-------------------------------------------------*/
remove_action( 'genesis_meta', 'genesis_load_stylesheet' );
add_action( 'genesis_meta', 'rs_child_stylesheet_cdn' );
function rs_child_stylesheet_cdn() {

  echo '<link rel="stylesheet" href="http://cdn.yourdomain.com/themes/child/style.css" type="text/css" media="screen" />'."\n";

}