push tests: make use of unused $1 in test description

diff --git a/t/t6300-for-each-ref.sh b/t/t6300-for-each-ref.sh
index 3bb901d50f5bdaadd74a4c869991c6315c66a8bc..e0496da812f34df16ef7c3417788f9096ddc1e0f 100755 (executable)
--- a/t/t6300-for-each-ref.sh
+++ b/t/t6300-for-each-ref.sh
@@ -310,7 +310,7 @@ test_expect_success 'exercise strftime with odd fields' '
        echo >expected &&
        git for-each-ref --format="%(authordate:format:)" refs/heads >actual &&
        test_cmp expected actual &&
-       long="long format -- $_z40$_z40$_z40$_z40$_z40$_z40$_z40" &&
+       long="long format -- $ZERO_OID$ZERO_OID$ZERO_OID$ZERO_OID$ZERO_OID$ZERO_OID$ZERO_OID" &&
        echo $long >expected &&
        git for-each-ref --format="%(authordate:format:$long)" refs/heads >actual &&
        test_cmp expected actual