~/tmp/gf $ uawin='Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2228.0 Safari/537.36'
~/tmp/gf $ uaosx='Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2227.1 Safari/537.36'
~/tmp/gf $ cssurl='http://fonts.googleapis.com/css?family=Open+Sans'
~/tmp/gf $ curl -A "$uawin" "$cssurl" -o win.css
~/tmp/gf $ curl -A "$uaosx" "$cssurl" -o osx.css
~/tmp/gf $ tail win.css
  unicode-range: U+0100-024F, U+1E00-1EFF, U+20A0-20AB, U+20AD-20CF, U+2C60-2C7F, U+A720-A7FF;
}
/* latin */
@font-face {
  font-family: 'Open Sans';
  font-style: normal;
  font-weight: 400;
  src: local('Open Sans'), local('OpenSans'), url(http://fonts.gstatic.com/s/opensans/v10/cJZKeOuBrn4kERxqtaUH3VtXRa8TVwTICgirnJhmVJw.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2212, U+2215, U+E0FF, U+EFFD, U+F000;
}
~/tmp/gf $ tail osx.css
  unicode-range: U+0100-024F, U+1E00-1EFF, U+20A0-20AB, U+20AD-20CF, U+2C60-2C7F, U+A720-A7FF;
}
/* latin */
@font-face {
  font-family: 'Open Sans';
  font-style: normal;
  font-weight: 400;
  src: local('Open Sans'), local('OpenSans'), url(http://fonts.gstatic.com/s/opensans/v10/cJZKeOuBrn4kERxqtaUH3ZBw1xU1rKptJj_0jans920.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2212, U+2215, U+E0FF, U+EFFD, U+F000;
}
~/tmp/gf $ winfonturl='http://fonts.gstatic.com/s/opensans/v10/cJZKeOuBrn4kERxqtaUH3VtXRa8TVwTICgirnJhmVJw.woff2'
~/tmp/gf $ osxfonturl='http://fonts.gstatic.com/s/opensans/v10/cJZKeOuBrn4kERxqtaUH3ZBw1xU1rKptJj_0jans920.woff2'
~/tmp/gf $ curl -A "$uawin" "$winfonturl" -o win.woff2
~/tmp/gf $ curl -A "$uaosx" "$osxfonturl" -o osx.woff2
~/tmp/gf $ md5 *
MD5 (osx.css) = e9ffd2fa48773c1dd072b5b922ec249a
MD5 (osx.woff2) = c1c35b53369097f76002c523bd6a2987
MD5 (win.css) = b1432e846ed08718b396e9566137999e
MD5 (win.woff2) = 4c9a4bc2b383253d953bad3699c3ab1b