Using repetitive covenant renewal to achieve temporary forgiveness (say, every week or year) is antithetical to the heart of the gospel.
If you’re under the Old Covenant, you feel the futility of having to repetitively renew your covenants, over and over and over again. Over and over. Never enough.
If you’re under the New Covenant, you feel the assurance of the finished “once and for all” work of Jesus Christ. The New Covenant is permanent, because the work of Christ on the cross is FINISHED.