`swift/utils/update_checkout` results in `zsh: permission denied`

I've filed a bug here: https://bugs.swift.org/browse/SR-11912

This has worked for me before (though I haven't tried it in some time) and I just tried this on a fresh install of Catalina (and it failed). I think this may have something to do with update_checkout becoming a python module. Has anyone else run into this issue?

The name is update-checkout with a dash. It appears our README shows the correct spelling, so maybe just a typo?

./swift/utils/update-checkout --clone

You are correct, so silly of me, thanks!

Though having _ and - differentiate the executable and folder seems a bit clever.