diff --git a/repo_resource/common.py b/repo_resource/common.py
index 6bea21c..bf895e1 100644
--- a/repo_resource/common.py
+++ b/repo_resource/common.py
@@ -270,7 +270,7 @@ def __get_remote_url(self, remote):
         return self.__remote_url[remote]
 
     def __get_remote_revision(self, remote):
-        return self.__remote_revision[remote]
+        return self.__remote_revision.get(remote)
 
     def set_rewrite(self, matrix: dict = None):
         if matrix is None: