Git workflow for Drupal.org issues
Inspired by chx's workflow http://drupal4hu.com/node/374, this is the workflow I used when working on multiple issues at the same time to rename Views functions.
This workflow worked for me. YMMV.
Starting out:
git clone --branch 8.x http://git.drupal.org/project/drupal.git 8
# checkout all of Drupal into a directory called 8- Start working on an issue. Make commits on your work. Since you likely don't have commit access to the Drupal project, you won't break anything for anybody else.