Get commit history from head, ignoring branches?

robert <[email protected]>
Newsgroups gmane.comp.version-control.cvs.general
Organization http://groups.google.com
Message-ID <c6879564-7052-448f-9048-55d6333e65da@a22g2000yqc.googlegroups.com> 
Hi all, I've googled for hours and can't find an answer to what I'm
trying to do. when I execute this command:

cvs history -z EST -c -a -D 10/7/2009 -pmy_repo

I get all the commits for all branches. I just want the HEAD commits
since that date, ignoring all branches. How can I do that?
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