We're working on Issues in GitLab. These issues are organised into Milestones. There is one Milestone called Bug fixes (initial testing) as a catch-all for everything that isn't in another Milestone.

In Moodle Tracker (Jira) we are using Versions, Epics, and Stories to give us a higher-level overview of what we're trying to achieve with MoodleNet.

https://bit.ly/MN-epics

Every Milestone in GitLab is a Story in Jira, and vice-versa. Stories in Jira are part of Epics, and together they form Versions.