We changed the git password recently and had quite a lot failing builds afterwards (or not even builds, because in checking build condition it already failed). The password is also stored in plaintext on the host which is a security risk because the password might leak.

We use https checkouts because distributing the ssh key to 300+ machines is not the best thing and also on Windows it is not that easy to use ssh at all.

I would expect Quickbuild to not store the password on the host, because it is a secret in QB. Also that way it would be able to change the password because it is not stored on the host in the gitconfig.