Document features and changes for phase 2.5 of master/main transition (#15745)

content/github/using-git/using-git-rebase-on-the-command-line.md

@@ -123,7 +123,7 @@ As before, Git is showing the commit message for you to edit. You can change the
 Since you've altered Git history, the usual `git push origin` **will not** work. You'll need to modify the command by "force-pushing" your latest changes:
 
 ```shell
-$ git push origin master --force
+$ git push origin main --force
 ```
 
 {% warning %}