use the git formula on the saltmaster to install the git pkg
    
    salt.gitfs.pygit2 (from salt formula) installs git. In case yet another
    formula installs git, we might get conflicts. Using the formula to
    install git is a central place to handle this. The git formula can also
    offer features (like handling .gitconfig) which we don't need yet but we
    might find useful in the future