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Description
Describe the idea (required)
Git commits that contain exactly the same files will have different commit hashes, but the same tree hash. For example, a merge or a squashed commit that is exactly the same as the merged/squashed branch will exhibit this. Also commits modified through git commit --amend.
Exposing this information can be useful for CI scripts to identified already built or tested artifacts.
The tree hash can be seen using git cat-file commit HEAD. (There may be other ways too.)
Tell us about the expected behaviour (required)
Make the tree hash available through a variable like git.commit.tree_hash.
Context (optional)
No response