On Android I use Markor to edit text -- it also recognizes Zim Wiki format if I remember correctly. And then Termux is nearly a full Linux distro with convenient touch icons for things like Tab, modifier, and arrow keys -- I installed the git package for it and used that to push/pull to my GitHub repo. Maybe that could be a solution for you?
Thanks for sharing, but this approach is not what I'm looking for. Being able to (auto)commit to git from the editor is priceless to me.
I've used Markor but there's too much file management involved, instead of organising pages at a higher level and letting the app handle the filesystem ops.