Yes. Do all the steps up to forming them and placing them in the pan. Cover the formed buns in the pan covered in saran wrap in the fridge overnight. The buns will pause at this step overnight and then continue to rise in the morning when they come to room temperature. The second rise takes longer as the yeast is slow from being chilled. Give it time, it will come alive again. I would honestly just make these as written instead of putting them in the fridge overnight. If you want a soft warm cinnamon bun in the morning toss it in the microwave for 30 seconds before eating it.