Powerline git dirty status without powerline_gitstatus

With git-prompt it is possible to display the dirty state (when a tracked file is modified) by setting the env variable GIT_PS1_SHOWDIRTYSTATE=true. Powerline can display the status of a git repository, such as number of commits ahead/behind, number of modified files etc. using the powerline_gitstatus module. Unfortunately, Fedora doesn’t have it packaged. I did some digging in, and found that there’s colour highlighting for branch_dirty and powerline.segments.common.vcs.branch function (which displays the current branch name) takes 2 parameters  to modify its behaviour. Modify the shell theme /etc/xdg/powerline/themes/shell/default.json under the left segment (because only left works in shell) then as follows:
    {   "function": "powerline.segments.common.vcs.branch",
        "args": {"ignore_statuses": ["U"], "status_colors": true},
        "priority": 20
The branch will now be highlighted if a tracked file is modified (ignore_statuses = ["U"] causes untracked files to be ignored). Clean repository:
Clean repo
Once a tracked file is modified:
Dirty repo