A convenient way to get the hash value from a website, is to open the site with firefox, login (if needed) through the firefox pop-up window, click on the lock icon in the URL address field and click on "More Information" > "View Certificate" > "Details". In window "Ceritifcate Fields" click on the first line, then "Export" and save this on your disk, e.g. under CERTIFICATE.
openssl x509 -noout -in CERTIFICATE -hash
should then output the hast value of the certificate.