Merge pull request #1621 from conda-forge/beckermr-patch-1

ENH add detail to branch migration announcement

Author: beckermr

src/user/announcements.rst

@@ -12,8 +12,18 @@ Our announcements are published to an RSS feed `here <https://conda-forge.org/do
 
     We will be migrating the default branches of all feedstocks and other ``conda-forge`` repos
     from ``master`` to ``main``. We do expect some minor hiccups while this migration is 
-    going on. If you encounter any problems, please comment on this Github 
-    `issue <https://github.com/conda-forge/conda-forge.github.io/issues/1162>`_.
+    going on. You will need to change to the ``main`` branch from ``master`` on any local clones via the 
+    following git commands:
+    
+    .. code-block::
+        
+        git branch -m master main
+        git fetch origin
+        git branch -u origin/main main
+        git remote set-head origin -a
+
+    If you encounter any problems, please comment on this Github 
+    `issue <https://github.com/conda-forge/conda-forge.github.io/issues/1162>`_. 
 
 2021
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