Sometimes need to change the Genesis‘s default content on demand of client to show clients requirement (i.e. footer logo, remove back to top, credential change, add footer link).

NOTE: When writing your own code/filters, use a child theme. Do not write to the default functions.php file in Genesis. It will overwrite on updates.
See below for codes I wrote to change Genesis Footer Content on child themes.
Customize the footer creds text
add_filter('genesis_footer_creds_text', 'auc_footer_creds_text');
function auc_footer_creds_text($creds) {
$creds = '©' . date('Y') . ' '
. get_bloginfo('name') .
'. All rights reserved. Powered by <a href="http://wordpress.org/">WordPress</a>.';
echo $creds;
}
Remove Footer Content
This will remove the footer credits text and ‘back to top’ link.
add_filter('genesis_footer_output', 'footer_output_filter', 10, 1);
function footer_output_filter($footer_content) {
$footer_content = '';
return $footer_content;
}
Add a WordPress Custom Menu in Custom Footer.
This will remove the default footer with credit text and Back to Top and add a WordPress custom navigation menu.
remove_action( 'genesis_footer', 'genesis_do_footer' );
add_action( 'genesis_footer', 'auc_do_footer' );
function auc_do_footer() {
$creds = '© Copyright '. date('Y') . ' ' . get_bloginfo('name') . ' . All rights reserved.';
$footernav = wp_nav_menu( array('menu' => 'footer' ));
echo $footernav;
?>