With larger repositories it's difficult to tell which branch you're on when selecting commits in the log view, so explicitly show the branch for each commit somewhere (probably the commit detail view).

Reported via AAC here: https://answers.atlassian.com/questions/223644/how-to-show-branch-column-in-log-view-sourcetree?page=1#227377

EDIT: As Yoriz reported, we already added this, so it's desired that it should be a column in the log view. This would definitely be an opt-in if decided upon as a go-ahead.