title: Get the order ID in checkout page before payment process
body: <p>In WooCommerce, I need to get <strong><code>order ID</code></strong> right in checkout page of WooCoommerce, <strong>before payment, when the order is created.</strong></p>
  
  <p>I look at all sessions and tried to find out when order goes for payment in <strong><code>order_awaiting_payment</code></strong> session, but I need it before going for payment. <br>
  So I think about a solution that is make order when checkout page loaded (In fact make it ready for payment) and when checkout real complete update it.</p>
  
  <p>How to get order ID in checkout page before order go for payment in WooCommerce?</p>
  
  <p>I think there is some hook for this but I can't find it.</p>