I need to replace a hose bib (bib wasn't secured to the brick and I bumped it, kinking the copper pipe) on a brick house with slab on grade. Luckily, it is on the wall of the garage. I stabbed a piece of metal from the outside through the sheetrock into the garage, so I know exactly where to cut into the wall. My plan is to cut away a large section of sheetrock on the inside, remove any insulation, re-pipe, if there is enough room I'll replace it with a frost proof sillcock, spray foam the penetration, replace the batt insulation, and repair the sheetrock.

Is there anything I'm not thinking about as far as the vapor barrier or water proofing or anything else?

Edit to add: I've soldered copper pipe 10+ years ago and its not rocket surgery but I do plan putting off the spray foam and wall repair for a week or so to make sure that the repair holds. I've cut into interior walls before to do electrical and plumbing, but never an exterior.

Exactly what i would do but i will add these.
You need drain water well below where you are soldering which may require you to pull the meter since faucets are typically very low in the systems.
Dont set house on fire, friend a former fire marshal talks about many they ran on with people soldering in the wall cavity.

Go buy a thin puece of metal if you are not good at soldering and put between pioe and plywood And solder away

Since it is in the garage, you could use a shark bite instead of soldering and then put an access panel where the shark bite is instead of re-drywall.

Thanks for the tips. I got it soldered yesterday. I was hoping I'd have a full 16" stud bay to work in but it would up being closer to 6". I got it done, though. The 2x4 was already charred from the original installation but it's only slightly blacker now.