New puppy!

So I’m getting a new dog this week. I’m told she is a german shepherd mix. Her siblings all look like gsd and gsd mixes. She is 13weeks and 11.5lbs according to the shelter but I got a vet appt ready to confirm/get a better approx of her age

My main question is, her siblings have short hair and its just her and one other that have longer haie. Don’t suppose anyone will have any idea what she’ll look like when she’s older? I know its a grab bag of luck, but I’m just curious. It could be puppy fuzz or maybe she’s gonna be long haired. I don’t even know what she’s mixed with.