How do I upgrade using GIT? From time to time, there will be minor and major updates to Drupal core. If the release is designated as a security update, we should apply the update as soon as we can. Otherwise, we may choose to apply the update at any time to receive the bug fixes it contains. There are also major release upgrades; we may want to apply these, so we have all the new and powerful features.

How do I upgrade using GIT?
I'd recommend installing and using Drush with GIT instead of only GIT when it comes to security or any other updates. It's really easy to update with drush.

drush up


will update everything

drush up modulename


will only update a module of your choosing

drush up drupal 


will only update drupal core.