As Bill D said, I have all my hoses fitted with plastic shut-offs and then brass quick-disconnects. I use a variety of nozzles depending on what I'm doing.
For safe wheelwell cleaning, the "nozzle" I use isn't even something designed to be a nozzle! It's a plastic quick-disconnect fitting, the female end. These are shaped sorta like a mushroom- the thing you pull down to open the fitting is at the end of it. It's not the end of the world if you bump your paint with it and its compact size fits into a lot of places. Gives a good flow of water too (adjust with the shut-off mounted on the hose).
I hold the hose at the shut-off, this places it and the brass quick-disconnect right around where my fingers are so I have decent control over it. I haven't had any problems with hitting the paint (at least not hard enough to matter) with the brass quick-disconnect.