Varnish cache different for each country with Cloudflare header

default.vcl

## ## Not complete default.vcl code
sub vcl_recv {
    set req.http.IPCountry = "no-specified";
   # usage ISO 3166-1 alpha-2 ( https://en.wikipedia.org/wiki/ISO_3166-1_alpha-2 )
   ## If I want to group BR and US in same group cache
   if (req.http.CF-IPCountry == "BR" || req.http.CF-IPCountry == "US") {
      set req.http.IPCountry = "group-br-and-us";
   } else {
      set req.http.IPCountry = req.http.CF-IPCountry;
   }
}

sub vcl_hash {
    hash_data(req.url);
    if (req.http.IPCountry) {
        hash_data(req.http.IPCountry);
    }
    if (req.http.host) {
        hash_data(req.http.host);
    } else {
        hash_data(server.ip);
    }
    return (lookup);
}