[Patch] Rails plugin does not get installed for http git repository

With latest version of Git (e.g. git version 1.7.0.2+), if you try to install (http git repository) rails plugin e.g. http://github.com/NZKoz/rails_xss.git , it throws following error

fatal: dumb http transport does not support --depth

This is because, http git repository does not support "smart http transport".

Rails plugins with git repositories which support of "smart http transport", will get installed without error. Currently GitHub does not support smart http transport.

I have written patch, assuming in general, most git repositories do not support "smart http transport". Also I could not find any other alternative than doing 'git pull' of repo.

See pastie for more info http://pastie.org/908200