I kept getting the following message when I tried running svn commands on my computer. I tried to accept the certificate permanently with no luck:

Error validating server certificate for 'https://subversion.assembla.com:443':
 - The certificate is not issued by a trusted authority. Use the
   fingerprint to validate the certificate manually!
Certificate information:
 - Hostname: *.assembla.com
 - Valid: from Wed, 16 Apr 2014 13:31:17 GMT until Thu, 24 Mar 2016 19:30:40 GMT
 - Issuer: http://certs.godaddy.com/repository/, GoDaddy.com, Inc., Scottsdale, Arizona, US
 - Fingerprint: ec:9f:9d:b2:39:e1:34:81:7b:27:f6:51:30:8b:ac:41:5b:62:09:19
(R)eject, accept (t)emporarily or accept (p)ermanently?