Migration from TFS to SVN with Git as Intermediary

Hi All 

I am tryong to migrate folders from TFS to SVN. i FOLLOWED THE FOLLOWING LINK (http://codeobsession.blogspot.com/2012/08/tfs-to-svn-conversion-with-history.html)

I am stuck at STEP 4: git rebase --onto <target-branch> <initial-commit-hash-id> master
example: git rebase --onto trunk aa3f2e9 master

In the steps i followed i never received “initial-commit-hash-id” 

Please need help.

Thanks

Did you get a solution?