Pull the remote default rather than master

data_repo_renderer/__init__.py

@@ -302,7 +302,10 @@ class GitUpdate(Renderer):
 
     template = textwrap.dedent(
         """
-        git checkout master
+        git remote set-head origin -a
+        default_branch=`git symbolic-ref \\
+            --short refs/remotes/origin/HEAD | cut -d/ -f2-`
+        git checkout ${{default_branch}}
         git pull
         git lfs pull
         git lfs track "data/**"

tests/test_full_yaml_file_and_cli.py

@@ -101,7 +101,10 @@ source "~/.data_repo_creds/SOTH.cred"
 
 echo "Not doing anything for pre-processing."
 
-git checkout master
+git remote set-head origin -a
+default_branch=`git symbolic-ref \\
+    --short refs/remotes/origin/HEAD | cut -d/ -f2-`
+git checkout ${{default_branch}}
 git pull
 git lfs pull
 git lfs track "data/**"