It may only be 4cm, but it's a start:

NASA’s Mars rover Opportunity has begun its long march out of the sandy dune in which it got stuck on 25 April. Ground controllers have got it to move more than four centimetres since Friday - considered a big victory.

I'd crack a joke about needing a come-a-long, but what would you tie the thing to? 4cm down, 4 meters to go.