A few days after placing my order I asked to receive my (POC) Purchase Order Confirmation sheet showing all options with price and that shows the VON (Vehicle Order Number). They provided me with a the updated POC that had the VON and VIN number of the vehicle. I then go to this site:
https://fcacommunity.force.com/Jeep/s/knowledge and click on Chat. There you can ask for an update on your build status. They will want the VIN, VON, and your name, address, and email. They then tell you the status of your build. Supposedly your dealership should be able to tell you the status as well, but I don't have full confidence in my dealership as they told me nothing has changed, eventhough Jeep Chat has changed from "parts being gathered" to all materials received and ready for build.