you should be fine for a month or so in the fridge. if the roots are 'ragged' on the ends, it wouldn't hurt to clip them with a sharp hand pruner to give them a nice clean cut. less surface area to lose moisture from. if you can, just throw them in a tub, bucket, planter with some compost until you can plant them. at least they will have a chance to throw out some roots. these critters want to grow and will naturally do whatever they can to become established so any little help you can give them will ensure a higher chance of survival to the lot. believe me, a little compost, a little water and within a month you'll probably have a bunch of sprouted hops! hop on!