git-cvsimport doesn't support the default branch mechanism?

Greetings,

I tried to git-cvsimport an existing project but there seemed to be
something wrong with the result.  On closer inspection I noticed
that contents of files that had never been modified in trunk
corresponded to revision 1.1 instead of the tip of the vendor
branch in the generated master and origin branches.

In other words (using zsh):

mkdir test
cd test
mkdir repo
export CVSROOT=`pwd`/repo
cvs init
mkdir foo
cd foo
echo lahna > kala.txt
cvs import -m "Initial vendor import." foo vendor vendor-v1
cd ..
rm -r foo
cvs co foo
cd foo
cvs up -rvendor
echo hauki >! kala.txt
cvs commit -m "Fake 2nd. vendor import."
cvs up -A
cat kala.txt

hauki

cd ..
git-cvsimport -d $CVSROOT -C foo.git foo
cd foo.git
git-checkout -f master
cat kala.txt

lahna

I would have expected to get "hauki" from that last "cat kala.txt"
as well.  Is this a known problem or a feature?  In either case, how
should I work around it?

-- 
Hannu