No good way to do anything about the part in concrete but it should be good for a long time. If you want to get rid of the exposed bits carefully measure and cut the flexhose close enough to the concrete that when you glue the fitting on the stub it fits tight to the concrete leaving none of the flexhose exposed. The use regular PVC to transition to something to connect to your hose fitting. Either a short length of garden hose or a washer hose. Something that can handle being exposed outdoors.
Paint any exposed PVC to protect it from the sun. Pretty much any paint will work.
I would also do something to anchor that stub to the wall behind it so that the flex pipe doesn't break at the surface of the concrete.