Force excerpts in Search results page regardless of Content Archives themes settings in Genesis

functions.php

add_action( 'genesis_before_loop', 'sk_excerpts_search_page' );
function sk_excerpts_search_page() {
  if ( is_search() ) {
		add_filter( 'genesis_pre_get_option_content_archive', 'sk_show_excerpts' );
	}
}

function sk_show_excerpts() {
	return 'excerpts';
}