Mostly the reverse, if you need to relate them a blockchain is a degenerate Git (history, which is a subset of Git itself):
A Git history is a DAG[0] (each commit can have multiple parents) and beyond that a polytree (it can have multiple roots); while a blockchain is an arborescence[2] (there's a single root — the "genesis block"; and each block can only have a single parent).
Further, beyond the technicalities blockchains are generally very linear (the side-chains tend to be pretty short, forks aside) while Git repositories can be extremely broad (have lots of concurrent branches).
A Git history is a DAG[0] (each commit can have multiple parents) and beyond that a polytree (it can have multiple roots); while a blockchain is an arborescence[2] (there's a single root — the "genesis block"; and each block can only have a single parent).
Further, beyond the technicalities blockchains are generally very linear (the side-chains tend to be pretty short, forks aside) while Git repositories can be extremely broad (have lots of concurrent branches).
[0] https://en.wikipedia.org/wiki/Directed_acyclic_graph
[1] https://en.wikipedia.org/wiki/Polytree
[2] https://en.wikipedia.org/wiki/Arborescence_(graph_theory)