Depends on your sales person.
If you have the order sheet, that will have the dealer ID and order number. In a month or so, use that to contact Ford Performance, see if you have a build week scheduled. Once scheduled, you will be able to get a VIN from your dealer. Only your dealer can give you the VIN.
Then, you wait. Also, don't get too excited about your build week, it's likely going to change. Next, don't get too excited when the truck goes into production, it may sit there for months...ask me how I know.
If your truck is a retail order, you will likely get emails from Ford. If you claimed a dealer stock order, you will not get anything.
Your best course of action is to forget that you ordered a truck and be surprised when it comes in. If you try tracking the progress and ride the roller coaster of the changing schedules and delays, you're going to be less happy. If you do decide to try to keep up to date with everything, you can then join us other idiots who have done the same and join in to our misery. Some claim that there is happiness to be found at the end of the misery, but I am doubtful.