git-svn and rebase causes duplicate log entries in svn

I have my own u-boot tree with a local branch where I do my own development. This this branch(called svn) is connected to a svn repo using git-svn.

Now I want to rebase my svn branch against latest u-boot and commit my rebased svn branch to svn.

I use git-svn commit -b svn -q remotes/git-svn..svn to commit my latest changes and when I do so I see my local changes once more in the svn log: ------------------------------------------------------------------------ r321 | jocke | 2006-11-14 09:45:14 +0100 (Tue, 14 Nov 2006) | 2 lines

Add install of HRCW into I2C EEPROM.

and here: ------------------------------------------------------------------------ r46 | jocke | 2006-11-13 19:09:19 +0100 (Mon, 13 Nov 2006) | 2 lines

Add install of HRCW into I2C EEPROM.

Any way to avoid that?

Question, I found that 
  git-svn fetch && git-rebase remotes/git-svn^2 svn
leaves the svn branch at the tip of my latest commit in the
svn branch which makes better sense to me then
  git-svn fetch && git-rebase remotes/git-svn svn
which puts svn at HEAD of remotes/git-svn.

Any reason I should not do the ...-svn^2 variant?

I am using git 1.4.3.5 and subversion 1.4.0