If you install Spacemacs from develop branch, don't change the defaults and enable just the git plugin, it's pretty much always going to work just fine unless elpa is down or something.

I install Spacemacs in every machine for the sole reason of using Magit with vim bindings. It's so far beyond all other git clients it's even hard to explain to others sometimes. If Magit existed as a native standalone app, I would be happy to pay €50-100 for it, right away. But, but... :/