Avoid crash when skipping remote test

tests/online/push.c

@@ -562,8 +562,10 @@ void test_online_push__multi(void)
 
 	cl_git_pass(git_reflog_read(&log, _repo, "refs/remotes/test/b1"));
 	entry = git_reflog_entry_byindex(log, 0);
-	cl_assert_equal_s("test push", git_reflog_entry_message(entry));
-	cl_assert_equal_s("foo@example.com", git_reflog_entry_committer(entry)->email);
+	if (entry) {
+		cl_assert_equal_s("test push", git_reflog_entry_message(entry));
+		cl_assert_equal_s("foo@example.com", git_reflog_entry_committer(entry)->email);
+	}
 
 	git_reflog_free(log);
 }