Return early if folder isn't a git repo
Return early if folder isn't a git repo

Minor performance improvement

mafredri/pure,jedahan/pure,boushley/pure,brandon099/pure,bramkok/purist,estoner/pure,sleep/pure,forivall/pure,lavelle/pure,christopherscott/pure,kane-c/pure,joshuarubin/dotfiles,rfnash/pure,yuya373/pure,btaidm/pure,alem0lars/pure,joshuarubin/dotfiles,depressiveRobot/pure-time,fvargas/pure,enrdstrm/pure,jaredru/zsh-pure,ZefQ/pure,joshuarubin/dotfiles,mcallan83/pure-plus,supercrabtree/pure,joshuarubin/dotfiles,dmiedema/pure,sindresorhus/pure,perks/pure,DFurnes/purer,runningskull/pure,KarlKode/pure,anandubajith/pure,kgrz/pure