Let's have a project (e.g. rpkg) which has following project option enabled: Activate Enforce signed-off commits in pull-request.
Pagure shouldn't allow pull requests which doesn't fulfil this condition for each commit.
Currently it allows pull requests which doesn't have this signed-off commits and denies merge of the commits with error message: "This repo enforces that all commits are signed off by their author."
This is a duplicate of https://pagure.io/pagure/issue/303