This time it is heavily biased towards Git:
Personally, I prefer the Emoji one over the colored bars, as I seem to be able to tell them apart without actively thinking about it, while the color one needs my attention.
Two subsequent git bundle exports do not have the same checksum, but they can be made to have one.
Matheus answers the question how little one has to do to get a simple valid repository with content.
The contents of the .git folder explained in detail by the masterful Julia Evans.