[cvsimport] Import CVS repository from a specified date or branch name

Hello,

I have a very large and old (serveral years) cvs repository and I want 
to import this in git.
For my work it is not nessecary to import all the revision history from 
the cvs repository.
It is engough to import only the revisions from a specified date or 
branch name of the cvs repo.

Is this possible with git-cvsimport?
If yes, how?
If no, is it possible to include such a function in the git-cvsimport 
script?

Thanks for any help.

Greets Klaus