Is it possible to set a start point for historical blocks?

If I only want to monitor the blocks from a starting point, is there a way I can tell nakamoto not to go sync headers all the way to genesis on boot up? I don't need history, and I would trust a checkpoint or multiple peers telling me the same block 100 confirmations back is valid.

If it's not already built, where would you recommend I look in the code to try to add this feature?

The issue names no files, tests, or entry points. Start by locating nakamoto's boot-time header synchronization and review how peers or checkpoints are trusted; done would be a supported start point that avoids syncing to genesis while preserving validation.

Written by the indexing model from the issue text.