lol I know what you mean I'm a groomer.
It still doesn't grow back the same and ruins the coat and it's feel, any groomer on here will tell you that.
GSD's don't have the same type of coat as a shihtzu,poodle,bichon etc. whos coats come back looking the same.
Plus he will be even hotter, the summer isn't over yet.
Shaving him won't get rid of the smell, it's imbedded in his coat and skin.
If a human gets sprayed on lets say their arm, the smell is in their skin it's not going to come out for awhile.
And shaving with a blade that short you could seriously hurt your dog, there are alot of areas where if you even nick them they will bleed and bleed and can die from blood loss. Or you could nick a tendon.