Sweet potato sprout

Just cooking some more for tea and found several small sprouts on them all. I'll put 1 in the fridge and see if it will overwinter there. The wrong time of year really but, looking at the place of origin, they are from South Africa so may be want to go home.

I've never tried growing sweet potatoes but surely to put a tropical plant in the fridge is going to result in serious damage or death? (To the sweet potato, not you or the fridge). I imagine anything below 10C is way too cold.