Unfortunately, that misses the bulk of user communications. Those bug reports and issues are also tremendously important. And since they link back to commits, its essential to obtain that history as well and maintain the appropriate link between the 2.
Else, changes were made for "reasons", and those justifications are effectively lost.
This was the main reason I started developing https://sit.fyi. It allows you to carry issues, discussions, patches as files (for example, in a git repo) in a decentralized way and has a tool that allows to import from GitHub
Else, changes were made for "reasons", and those justifications are effectively lost.