Moving 'bases' from the local git-svn repository over to SF.net was quite enlightening. The local git-svn repository was pointing to a SVN repository which could not be accessed. git-format-patch converted the git-svn repository into a series of patches, and git-am happily applied those patches onto the new git-svn repository at SF.net.
In fact a simple fetch+rebase in the new git-svn repo would have done the magic. But, I had to lose the git-svn-id tags that every commit log had. Lucky that there were only 32 revisions. Else I would have had to read the 'sed' manual which I have been carefully avoiding for a long time now :P