t1405: make hash size independent

Instead of hard-coding a 40-based constant, split the output of
for-each-ref and for-each-reflog by field.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/t1405-main-ref-store.sh

@@ -54,7 +54,7 @@ test_expect_success 'for_each_ref(refs/heads/)' '
 '
 
 test_expect_success 'for_each_ref() is sorted' '
-	$RUN for-each-ref refs/heads/ | cut -c 42- >actual &&
+	$RUN for-each-ref refs/heads/ | cut -d" " -f 2- >actual &&
 	sort actual > expected &&
 	test_cmp expected actual
 '
@@ -71,7 +71,7 @@ test_expect_success 'verify_ref(new-master)' '
 '
 
 test_expect_success 'for_each_reflog()' '
-	$RUN for-each-reflog | sort -k2 | cut -c 42- >actual &&
+	$RUN for-each-reflog | sort -k2 | cut -d" " -f 2- >actual &&
 	cat >expected <<-\EOF &&
 	HEAD 0x1
 	refs/heads/master 0x0