(
cd four &&
git remote rename origin upstream &&
- rmdir .git/refs/remotes/origin &&
+ test -z "$(git for-each-ref refs/remotes/origin)" &&
test "$(git symbolic-ref refs/remotes/upstream/HEAD)" = "refs/remotes/upstream/master" &&
test "$(git rev-parse upstream/master)" = "$(git rev-parse master)" &&
test "$(git config remote.upstream.fetch)" = "+refs/heads/*:refs/remotes/upstream/*" &&