You could get grass growing temporarily. A spray company could spray grass seed, you'd water constantly and then you take a picture to make it last.
Have you considered a voracious vine? My choice would be Golden Hops. This is one amazing vine. Can also be used to make beer. It is a perennial and dies out for the winter. Easy to clean up the dead vines/leaves. From the roots this plant comes back in the spring with a vengeance! Stand back...within a few weeks to a month those gabions will be covered completely. I've seen 3 feet of growth per day. The lime green color is lovely.
Forget turf. Lots of other vines to consider but this is the easiest to maintain dying out for winter. The ability to clear out the old material and in spring get an entire new lush vine covering. I loved this vine. I wasn't watching and this vine grew and covered my 12X12 screen, up and over trees and a fence and was headed for the road...a good 50 feet by August. If you do make beer, any of the hops family of your choosing will do the same except they'll be green. Make sure you get both sexes planted or at least the female. The flowers are like little Japanese rice paper lanterns...lime greens, mauve and purple.