Well  I imagine last night finished off the yearlings in the garage.  It's 12 F now and I don't want to risk opening the garage to let out any heat. Ha!  I'm pretty sure the green house babies are too cold but should be above freezing. At my age a year is a large percent of the rest of my life. That's a cheery thought.  On the bright side the central heater was replaced yesterday and I don't have to sleep with 2 large dogs and tubs of cups sharing a space heater.  The  perky little cup babies still look happy and eager.  Little do they know  .

Sorry to hear that. But they may surprise you. Mine were outside during 19F temps. But I'm optimistic.

By yearlings I assume you mean one year old plants which are probably in 3 gallon or larger containers, correct?  If so I think there's a good chance they will be fine, especially if the 12 degree temperature is outside rather than inside the garage.  1 gallon pots would be more dicey.  I have heard others post on the forum that figs that appeared to dead in the spring came back from the roots a couple months later so don't give up.  On the bright side be thankful you are in zone 8a!

Hold on to them till late/end of spring and hope for the best.
Temperatures in the garage should be a few degrees higher, and also important - no dry desiccating winds.

SoniSoni, in same boat as you.  Hoping yearlings made it past the 7 degree temps we have seen. On the plus side, we have what appear to be some very optimistic trees in the neighborhood so perhaps spring is not as far off as it appears to be.

Another danger to be aware of is that young plants in containers stored away for the winter don't need much water but they can dry out so I give them a small drink once a month. 
If you have you placed the plants close together against a wall and with some covering you may be OK.  Where I am it is has been 0F and in the garage around 20F but I have my plants bundled together against the house wall with a plastic covering over the bunch.  This has always worked for me but this year the temps are much lower so will find out later in the year.
In the past I have found that even if they don't spring back to life in the spring they finally started to grow in late August.  Two of these I have no had for over 20years.  So don't give up.

I think Mike is just starting his rooting.
His computer may be buried under perlite bags right now;)

You will be surprised at how many will survive.  Up on the farm which is slightly North of Marshall, we had 13-14f and I was amazed that there are still green tips.

Good luck

I've been keeping potted figs in garage in zone 5 for a few years.  I used to wrap the pots in towels and get them off the concrete with wood, plus wrap the limbs with newspaper to block drafts.  Then one winter when I had more I improvised and put them behind a ping pong table in the back of the garage to block winds; still off concrete, but no other protection.  We  would open the garage for periods while I would snowblow the driveway in blizzards and anytime we were coming and going because the cars were in the garage.  Surprisingly, I had very few losses but I do remember this last year having a Col de Dame Blanc that died and when I brought my pots outside in spring I stuck a limb that broke off a tree in the CdD pot.  I never removed the dead CdD, just in case and just used the desecated stem to tie a label tape on.  I'm pretty sure the limb of some other variety that I stuck in there never ended up rooting, however, surprisingly, sometime in late summer or early fall as I recall, I looked at that pot and saw this tree growing and the leaves mysteriously looked a lot like CdD.  I was pretty sure I remembered the other limb I stuck in there dying so I was really shocked to see this.  Somehow the thing basically took all spring and summer to muster the energy then burst life from underneath.  It was only in about a 1-2 gallon clay pot too!  Moral of the story is give em a whole growing season if possible to bounce back cuz you never know.
Also, I open my garage all the time up here now, and we've been having -10 to 0 temps daily for a week or two and will continue to have those temps for another week coming.  So if it's an attached garage and the plants are farthest from the outside opening and possibly blocked from wind a little, I wouldn't be overly concerned.  The one caveat here is that mine have probably slowly acclimated to the colder temps whereas southern growers may not have had plants as acclimated.  Also, I think whether it's an attached garage probably matters because the house gives off some heat.

I left 3 cuttings out in 0F lows and 18F highs  out in the open for 3 days, I just missed the figs when I put the others in. The figs were in 1 gal and where just fine,one lost the tip. Rex.

Rex, what varieties where those?

  Hi Greg, they were an unknown white bronx fig, sweet george, and floria,

Hi Sonisoni,
We have to wait and see - Don't panic ! - you could make it worse by trying to make it better.

All we need is make our "duties".
So keep in mind for next year, that you perhaps need some more protections for your trees .
In spring, you will see if you are proved to be right or wrong - and you might see that the protections you have are enough.
From my experience from past years, my in ground trees are all tied up to the main trunk, and all got a plastic bag over them (80 liters bags).
Figs are hardy trees so lets hope and nevertheless learn from our experiences!
From what I read on the forum, hopefully, this spring will be full of experiences reports for freezing tests :)
Did I mention that melted snow is falling right now here :)