Change the StudioPress header link

You need to add (and change) the following code into functions.php:

add_filter( 'genesis_seo_title', 'child_header_title', 10, 3 );
/**
 * Change default Header URL.
 * 
 * @author Ovidiu Purdea
 * @link https://www.wpguru.info
 */
function child_header_title( $title, $inside, $wrap ) {
    $inside = sprintf( '<a href="http://test.com" title="%s">%s</a>', esc_attr( get_bloginfo( 'name' ) ), get_bloginfo( 'name' ) );
    return sprintf( '<%1$s id="title">%2$s</%1$s>', $wrap, $inside );
}