+ <topbloke patch name>
+ .f <ref name including refs/heads/>
+ .tg <ref name not including refs/heads/>
+ (empty in base branches)
+
+ deleted exists (but empty) if branch is deleted
+ exist in tip only branch
+
+ patch- name of this topbloke patch (plus a newline)
+ exists in base and tip
+
+ topgit- name of the topgit branch that this was
+ imported from and which we should merge from
+ (plus a newline); exists in tip only