Help!!! Can this sponge be rescued?

I need help!  I'm made my sponge for cinnamon raisin bread and I added the butter to the flour mix that I sprinkled on top of the sponge (that was going to chill in the fridge overnight).  I don't know what I was thinking.  I am a novice bread maker and I don't know if this will greatly affect the outcome of the bread.  I'm low on butter, so don't want to just chuck it if I don't have to.  Thanks!!!