Lower your rear tire pressure to about 20psi, sack cloth, sand, gravel. Then back out slowly using handbrake to help you modulate. This can also help the limitted slip diff transfer the torque a bit.
When you get out drive safely / slowly to the gas station and air up your tires to regular pressure.
Some people use tire chains but, I'd stay away from that unles the above doesn't work. You can throw a chain and cause body damage. Trucks do it all the time. However, they don't have wide tires with small wheel clearances.
Good luck !!!
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