Krishna lays out the consequence. Those who act with attachment to results face three kinds of karmic fruit after death: undesirable, desirable, or mixed. In every case, the fruit ties them to the cycle. Whether the result is sweet or bitter, the rope of attachment holds.
But for those who have truly let go of the craving for outcomes? No fruit at all. Not the bad kind, not the good kind, not any kind. The word 'kvachit' is emphatic — never, under no circumstances. The chain is broken.
This is the Gita's promise to the renouncer of results. You will not escape the consequences of action by running away from action. You escape them by releasing the inner demand for a specific outcome.