add_action('init', 'cloneRole');

function cloneRole()
{
    global $wp_roles;
    if ( ! isset( $wp_roles ) ){
        $wp_roles = new WP_Roles();
    }
    $wp_roles->add_role('brewery', 'Brewery',     array(
        'read'         => false,
        'edit_posts'   => false,
        'delete_posts' => false,
    ));
}