You can always try using a pressure washer. Either purchase one or rent one. Alternatively, you can try hosing down your concrete. You might need to scrub it a little.
I recommend using a product that is safe for the environment, a 'green' pine cleaner and spraying it on the area. Let it sit for a few minutes and then spray it down with water. Should take it right off.
you could try a few things to clean this. one would be o power wash the area, this helps to clean deep. Or mop with a bleach and water solution in the area.
First spray it down with water. Then put soap on the area and let it set for a minute. Then scrub with a brush and rinse. If there is still some there a power washer will do the trick. You can also pick up industrial strength cleansers at you hardware store.
Start by scooping as much poop off the concrete as possible. Then a power washer will do a great job of removing the rest and any stain. When dry your concrete will look like new.
Remove the poop using steel dust pan(with handle)or with two thick sheets of plastic or cardboard sheets. After removal cover the surface with sand, after 2-3 mins remove the sand.