replaced references to `git` with `command git`, to make the shell faster for git wrapper users
replaced references to `git` with `command git`, to make the shell faster for git wrapper users

rubenvarela/theme-agnoster,oh-my-fish/theme-agnoster,scorphus/theme-agnoster,decors/shellder,FabioAntunes/theme-agnoster,WBTMagnum/theme-agnoster