The OpenDingux kernel started as a fork of the Qi Hardware kernel for the Ben NanoNote, which uses very similar Ingenic SoC as its core. The fork never diverged very far from its origin and we exchanged many patches in both directions. Therefore we decided it is easier to do development in a single place. We selected the [http://projects.qi-hardware.com/index.php/p/qi-kernel/](git repository at Qi Hardware) as that single place.
The interesting branches are "jz-version", where version is the Linux kernel version that the branch is based on. The Dingoo specific instructions are in the file README-A320 at the top of the source tree.
We will continue to use the issue tracker on github for Dingoo specific issues. If you don't know whether an issue is Dingoo specific, please file it on github and we'll move it if necessary.