Use repo name rather than a dirname for commitPrefixes

**Is your feature request related to a problem? Please describe.**
It is not possible to have a per project rules now if the dirname contains more than a project name, which makes it difficult to work on multiple copies

**Describe the solution you'd like**
Use the `git config --get remote.origin.url | sed -E "s/.*?:(.*)\.git/\1/"` rather than the dirname where possible