<?php
  /**
   * Hook - construction_base_action_footer.
   *
   * @hooked construction_base_footer_copyright - 10
   */
  do_action( 'construction_base_action_footer' );
?>
<?php wp_footer(); ?>
</body>
</html>

add_action('construction_base_action_footer', 'action_name');

function action_name() {
  remove_action( 'construction_base_action_footer', 'construction_base_footer_copyright', 10 );
  echo "<p>Additional text</p>";
}