fetch: allow a pull/update immediately after a clone

giteapc/repo.py

@@ -221,6 +221,7 @@ def fetch(*args, use_ssh=False, use_https=False, force=False, update=False):
             if not has_tag and not force:
                 raise Error(f"{r.fullname} doesn't have the [giteapc] tag, "+\
                     "use -f to force")
+            r = s.resolve()
 
         # Checkout requested version, if any
         if s.version: