How often is the 5e OGL Repository updated?

I just switched to a custom sheet using the 5th Edition legacy sheet but it out of date- I had some serious issues with NPC Trait Desc vs NPC Trait Description, but managed by way around it... How often is the Repository on GitHub updated? I'd love a new copy instead of beating my head against a wall with these changes- like 2 columns NPCs and lockable NPC abilities. Thanks!

AFAIK, the Legacy sheet is frozen. They split development earlier this year(?). The D&D 5th Edition by Roll20 sheet continues development, but the legacy sheet is there to provide a reference for those sheets which were built off of it.

Does that mean I can never get a copy of the source code for the current OGL one?

I believe all of the official sheets are hosted on a private git now. So no, I don't think you can. :(