反代 Google，用的日本/香港 VPS，如果设置 upstream 为 www.google.com 会跳转到 hk/jp，但是又不想用 www.google.com.hk/www.google.co.jp，请问如何简单设置？

server {
    listen       443 ssl http2;
    server_name  example.com;
    add_header Strict-Transport-Security "max-age=31536000; includeSubdomains;";

    ssl_prefer_server_ciphers   on;
    ssl_certificate /path/to/ssl.crt;
    ssl_certificate_key /path/to/ssl.key;
    ssl_session_cache shared:SSL:10m;
    ssl_session_timeout  5m;
    ssl_ciphers 'EECDH+AESGCM:AES256+EECDH';
    ssl_protocols TLSv1 TLSv1.1 TLSv1.2;

    location / {
        proxy_pass https://www.google.co.jp/;
        proxy_redirect off;
        proxy_set_header   Host    www.google.co.jp;
        proxy_set_header   Referer http://www.google.co.jp;
        proxy_set_header   X-Real-IP   $remote_addr;
        proxy_set_header   X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header   X-Forwarded-Proto https;
    }

}

server {
    listen 80;
    server_name example.com;
    return 301 https://$host$request_uri;
}