XML-RPC server accepts POST requests only.
//remove the default jQuery script
add_filter( 'wp_default_scripts', 'change_default_jquery' );

function change_default_jquery( &$scripts){
    if(!is_admin()){
        $scripts->remove('jquery');
    }
}

//inject a new one from a remote source
add_action('wp_enqueue_scripts', 'ocean_theme_scripts');

function ocean_theme_scripts() {
    if(!is_admin()){
        wp_register_script('jquery221', '//code.jquery.com/jquery-2.2.1.min.js', null, null, true);
        wp_enqueue_script('jquery221');
    }
}
add_filter( 'wp_default_scripts', 'change_default_jquery' );

function change_default_jquery( &$scripts){
    if(!is_admin()){
        $scripts->remove( 'jquery');
        $scripts->add( 'jquery', false, array( 'jquery-core' ), '1.10.2' );
    }