Konasdad, like BenC said, don't worry about it. Even if the greens have developed above ground, like Ben's, that is still good. The greens may freeze off, they may not, I have had garlic greens all winter long here, when I plant at the proper time, hee, hee
Garlic can take extremely deep freezes and be OK. It is when the cloves get bumped out of the ground from the frost heaves that there is issue. Just push the garlic back into the ground, and use mulch to keep it down, that is your best bet. I still haven't gotten around to planting my garlic, I normally do that around the end of September. Garlic does the very best when it can grow slowly underground throughout the entire winter. I really need to get mine in, but the soil is so wet, I can't get the manure turned under with my rototillar, and I can't plant until it has been turned under a little bit. Eeks. Oh well. Eventually.
Garlic does not do well if it is planted in the spring. The bulbs come harvest time are just not that mature, I have had experience with that one, hee, hee. So, maybe it is gonna just be a dig under-the-ground-with-a-shovel deal here this year. If that be so, that is gonna be a lot of heavy duty digging and work, but then, just suck it up, girl. Have that most wonderful and awesome day, Cindi