Update til

git/adding-remote-to-existing-repository.md

@@ -5,5 +5,15 @@ git remote add <name> <url>
 Example:
 ```
 git remote add origin git@github.com:Asocia/til.git
-git push -u origin master
+git push -u origin my_branch
 ```
+
+If you get an error like
+```
+error: remote origin already exists.
+```
+
+you can:
+  
+    - remove the origin and try again. `git remote remove origin`
+    - add it with a different name. `git remote add ... ...`