[lowry]

Looking at the name... blockchain or chain of blocks... or a queue in CompSci speak... is less complex than git. Git is a directed acyclic graph.

[subway]

That kind of breaks down if you consider existing chains have forked. See Ethereum vs Ethereum Classic or Bitcoin vs Bitcoin Cash as examples.

Git, Bitcoin, Ethereum, and Certificate Transparency logs are all examples of merkle trees (and argubly blockchains).