Correctly handle dist-git repos that require commits to be signed off

[sentry[bot]]

Sentry Issue: PCKT-002-PACKIT-SERVICE-5SS

{'error': 'This repo enforces that all commits are signed off by their author.', 'error_code': 'ENOSIGNEDOFF'}

[csomh]

Documentation was updated to require this feature to be turned off in Pagure.

We are waiting for legal advice whether this is okay, or there are further steps required.

[lbarcziova]

@lachmanfrantisek after the meeting with the lawyer, can we proceed with this issue somehow?

[lachmanfrantisek]

We are still waiting for the final confirmation but "it should be fine for the bot to do the sign-off".

[lbarcziova]

@lachmanfrantisek do we have any update here?