Avoid guessing in switch

The previous code path was untested and not working

lib/git.py

@@ -46,7 +46,8 @@ class Git:
         )
 
     def open(self):
-        self.git_run(["init", "--object-format=sha256", "-b", "factory"])
+        if not self.exists():
+            self.git_run(["init", "--object-format=sha256", "-b", "factory"])
 
     def is_dirty(self):
         """Check if there is something to commit"""
@@ -89,7 +90,7 @@ class Git:
         else:
             ref = f"refs/heads/{branch}"
             if (self.path / ".git" / ref).exists():
-                self.git_run(["switch", "-q", branch])
+                self.git_run(["switch", "--no-guess", "-q", branch])
         return new_branch
 
     def commit(
@@ -266,7 +267,10 @@ class Git:
         )
 
     def push(self, force=False):
-        if "origin" not in self.git_run(["remote"]).stdout:
+        if "origin" not in self.git_run(
+            ["remote"],
+            stdout=subprocess.PIPE,
+        ).stdout.decode("utf-8"):
             logger.warning("Not pushing to remote because no 'origin' configured")
             return