invalid_ref "$(printf 'heads/foo\t')"
invalid_ref "$(printf 'heads/foo\177')"
valid_ref "$(printf 'heads/fu\303\237')"
-invalid_ref 'heads/*foo/bar' --refspec-pattern
-invalid_ref 'heads/foo*/bar' --refspec-pattern
-invalid_ref 'heads/f*o/bar' --refspec-pattern
+valid_ref 'heads/*foo/bar' --refspec-pattern
+valid_ref 'heads/foo*/bar' --refspec-pattern
+valid_ref 'heads/f*o/bar' --refspec-pattern
+invalid_ref 'heads/f*o*/bar' --refspec-pattern
+invalid_ref 'heads/foo*/bar*' --refspec-pattern
ref='foo'
invalid_ref "$ref"