Vim's non-linear undo[1] history is hard to beat. Set undofile [2] and you are done with local versioning. For visualisation of the undo tree, install undotree [3]

[1] https://vimhelp.org/undo.txt.html#undo

[2] https://vimhelp.org/options.txt.html#%27undofile%27

[3] https://github.com/mbbill/undotree