I cut off, dug up a dozen rooted low branches of my brown turkey and transplanted them to a field with the intention of trying to graft some new things on to them next spring. Would cuttings bought now and held in the refrigerator still be ok to use or are newer cuttings taken and available in the early Spring?  I've grafted pecan trees with cuttings taken after dormancy and just kept bundles in the frig until I needed to use them in April, but pecans are a much harder wood.
Thanks for any suggestions.

I was about 1 for 20 doing what you want to do this spring. But that was with cuttings that also didn't root. Better cuttings of my own taken in Dec rooted pretty well in June. Those I could have grafted with at least decent success.

Your best bet might be to buy cuttings in spring from a reputable source like HarveyC. He's from CA so is able to harvest his cuttings fairly late with assurance that they aren't freeze damaged.