How do I get the hash for the current commit in Git?

Question 1

How do I get the hash of the current commit in Git?

Question 2

To turn any extended object reference into a hash, use git-rev-parse:

git rev-parse HEAD

or

git rev-parse --verify HEAD

To retrieve the short hash:

git rev-parse --short HEAD

To turn references (e.g. branches and tags) into hashes, use git show-ref and git for-each-ref.

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