Update clone_subtree_no_master.t
$ cd sub1
- $ git checkout main
- Switched to a new branch 'main'
- Branch 'main' set up to track remote branch 'main' from 'origin'.
+ $ git checkout -q main
$ cat .git/refs/remotes/origin/HEAD
cat: .git/refs/remotes/origin/HEAD: No such file or directory
