Split a subversion repo into several git repos

Hi, I would like to convert a subversion repository to Git. The subversion repository used to track development of several projects (only slightly related), and I would like to divide the repository into several smaller git repositories.

For example, I want to convert one subversion repository which contains the folders: trunk/projectA trunk/projectB

into two git repositories: projectA.git projectB.git

As far as I have understood, the way to do this is to
1) Convert the entire subversion repository to git with git-svn.
2) Make two copies of the whole new git-repository (projectA.git and  
projectB.git).
3) Use git-rm to remove projectB from projectA.git, and projectA from  
projectB.git.

This works fine, but both git-repositories now carries the history for both projects. If possible, I would like to "clean" the history in the repositories, so that I don't see history information for projectA when I am browsing logs in projectB.git. Has anyone been in the same situation? Do you have suggestions on how it can be solved?

Any help will be greatly appreciated.

Thanks, Eivind