Fedpkg lint shows "Could not execute lint: Failed to execute command."

While following the fedora packaging tutorial in the docs, the ‘fedpkg lint’ shows the following two messages

Failed to get repository name from Git url or pushurl


Could not execute lint: Failed to execute command.

However it seems that it is succesfully checking the local spec file.
So I am wondering if something is wrong or if I should just ignore these messages.
In the last case I am happy to update/extend the documentation that these messages should be ignored…