-The "git checkout" command creates a 'mob' branch from upstream's
-corresponding branch and makes it your current branch. You will be
-working on this branch.
-
-The "git config" command records in your repository configuration file
-that you would push "mob" branch to the upstream when you say "git
-push".
+The "git checkout" command creates a new branch to keep your work
+isolated and to make it simple to post your patch series when
+completed. You will be working on this branch.