You could try them as bedding in your coop instead of pine shavings. You could even try them as bedding in your nest. But I'd want them to be really dried out, more like hay. If they are still green they can rot, compost, break down whichever words you prefer. That probably would not work well. They will be fine and will pack if they get wet, so keep them dry, just like you need to do with your pine shavings. They will eat some but as long as they have grit they'll be OK. If your chickens forage on grass feeding then grass clippings seems a waste.
Some people turn their coop floor into a compost pile, the Deep Litter Method. This generally works better on a coop on the ground instead of elevated. Fresh grass clippings can work in that. They'll eat some and help you compost the rest with their scratching.
Some people feed them grass clippings in the run, just toss them in. Some of that depends on how big your run is and how deep the grass clippings would pile up. Some people turn their runs into a compost pile, fresh grass clippings would be good for that.
Mine forage for grass and I have a mulching mower. I leave the clippings to break down on the lawn, they are good fertilizer as they rot.