How to retrieve the hash for the current commit in Git?

How to retrieve the hash for the current commit in Git?

git git-hash

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Get the current git hash in a Python script

python git git-hash

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How does git compute file hashes?

git hash sha1 checksum git-hash

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Telling if a Git commit is a Merge/Revert commit

git git-merge git-commit git-hash

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How does Git create unique commit hashes, mainly the first few characters?

git algorithm hash git-hash

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