Re: Security problem

You are right, I trust my file system. But if our team had central repo with ssh access to that machine, every developer can hack central repo.

Whould git-clone/git-fetch warn me about this ?

My own test with (another) local repo says:
lan@lan:~/tmp/git/test> git clone 1 2
Generating pack...
Done counting 3 objects.
Deltifying 3 objects.
 100% (3/3) done
Total 3, written 3 (delta 0), reused 0 (delta 0)
error: git-checkout-index: unable to read sha1 file of a 
(3609f20ebd357679b111783e8afaf36ec46427f3)

It can't checkout object (3609f20ebd357679b111783e8afaf36ec46427f3 is the original file). It seems packed repos are safe from this point.