I have tried the instructions found at http://confluence.atlassian.com/pages/viewpage.action?pageId=203393680.
I get an error (403) on accessing the ondemand svn repository. Is the proper url: https://<account>.jira.com/svn/ or is there a name of repository under that url?
That is the correct URL. You need to make sure that the user account you're using has application access to FishEye/SVN (Admin -> General -> User Management -> Application Access) and that the account has SVN permissions to access the whole repository (Admin -> Source -> Project Permissions).
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