Get hot/warm water outside?
I'm moving into a new townhome and I'd love to have the option to get variable temperature water into a sprayer/faucet... and know absolutely nothing about plumbing 
The hot water tank is in the garage, and there is an existing line to a front+rear hose hookup, but I naturally assume it's explicitly cold water.
Is there an easy-ish way to get hot water out there/be able to mix hot+cold for warm water? Either out one of the existing hose lines or some other way? And assuming a solution, how complicated/expensive is it?
Goal is to use my back patio's line to have a bit of a wash-off area for muddy hikes and muddy dogs.

The hot water tank is in the garage, and there is an existing line to a front+rear hose hookup, but I naturally assume it's explicitly cold water.
Is there an easy-ish way to get hot water out there/be able to mix hot+cold for warm water? Either out one of the existing hose lines or some other way? And assuming a solution, how complicated/expensive is it?
Goal is to use my back patio's line to have a bit of a wash-off area for muddy hikes and muddy dogs.