Thanks for the resource!

I've noticed that if I run a clone `git clone https://gitexercises.fracz.com/git/exercises.git` it gets cloned in "DETACHED HEAD" mode and I need to checkout master, i.e. `git clone https://gitexercises.fracz.com/git/exercises.git -b master`.

Any idea why that is? (It ultimately wasn't a problem once I switched to master, but without doing so there would be no configure.sh script either and I'm asking in case someone else runs into the same issue).