Add GIT UPDATE to your manual and Invite email

I’m missing HOW UPDATE GIT in your manual pages here
and in Beta Invite email where is Quick Start

I.E. if I already clonned git via git clone… and know after two weeks I would like to used to updated version of your installation scripts… git clone wouldn’t work

I think that is needed to update project by
cd letsencrypt
git remote update
and than execute instalation ./letsencrypt-auto …

Yes but need to know also what’s the change in the update version.

example here:
changed --domains in --domain
LE are in beta, in the finale relase maybe it will auto update or with very small patch