This isn't exactly what you asked for, but I figured it might come in handy for informational stuff in the future.
http://www.wannabrowser.com/index.html
It'll hit any page you want and report itself as different browsers to let you test .htaccess stuff and whatnot. I don't think it contains one for google though.
I haven't played much with "wget", but that will allow you to change the browser agent it reports when it connects to something, you might be able to get that to report itself as google.