git cvsserver and database permissions

Hi

I'm trying to set up git cvsserver in a shared repository.

It works very well, but the database file for each branch (for example "gitcvs.master.sqlite") is created by the first user which access it and without group-write permissions, then I have to manually fix the permissions.

Shouldn't it honor core.sharedrepository?
Is there any place where I can configure it to create files with group-write permissions? 


Thank you,

 - Samuel