이거구나

app.py

@@ -1074,7 +1074,7 @@ def update():
 
         os.system('git remote rm origin')
         os.system('git remote add origin https://github.com/2DU/openNAMU.git')
-        ok = os.system('git pull origin ' + up_data)
+        ok = os.system('git fetch origin ' + up_data)
         ok = os.system('git reset --hard origin/' + up_data)
         if ok == 0:
             return redirect('/re_start')