Always use the remote tracking branch while deploying

managetests/branches.py

@@ -89,7 +89,7 @@ class Branch:
             "rm -rf %s" % self.manager.build_dir,
             "mkdir -p %s" % self.manager.build_dir,
             "cd %s && git fetch" % self.manager.git_dir,
-            "git --git-dir=%s/.git --work-tree=%s checkout -f %s" %
+            "git --git-dir=%s/.git --work-tree=%s checkout -f origin/%s" %
                 (self.manager.git_dir, self.manager.build_dir, self.name),
             "cd %s && invoke build" % self.manager.build_dir,
             "virtualenv -p python3 %s/%s" % (self.manager.envs_dir, self.name),