Well, you can still go the official route and send source code request to the address in about device settings. I'm sure they'll post you the disk eventually. There's probably other copyleft licensed bits besides the kernel and that is the best way for Jolla to meet all their legal requirements. As far as I've understood there was some hopes/plans for Jolla company repo but setting up the infrastructure wasn't prioritized due to company resources.

I'm a huge fan of how kernel source was released on my current Moto G. That's something every company could learn from.
https://github.com/MotorolaMobilityLLC/kernel-msm

I'm not sure if the "chaotic and disorganized" was aimed at my git practices. :P You can go to the releases page and download a tarball for any tagged release. Basically that's not any different from what I've received.