Fossil (https://www.fossil-scm.org ) has an interesting approach to this problem - integrate bug and work item tracking, project wikis, and source control, but make them all distributed, so that there is not a single master copy of the bug database or the docs wiki.

It attempts to solve both the cultural challenge (bugbase written by a different company/team from the source control, imposing 2 different styles on you) and the technical one (bugbase and source control don't talk to each other, and so bugs and checkins are not linked).