coho prepare-plugins-release is broken for new repo checkout

[janpio]

I tried to get coho prepare-plugins-release to work, but during my testing I had to ? Do you want to use an existing set of plugin repositories? WARNING: If no, I will ask for a directory where I will clone all the needed repositories. No.

This lead to the tool using plugins from the subfolder of where I was executing the command instead of the newly created checkout folder.