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If U is a git URL (e.g., an ssh URL), how can I find the SHA1 hash of a branch or tag of U without a local clone of U?
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Background. At its core, the Git version control system is a content addressable filesystem. It uses the SHA-1 hash function to name content.
You can get heads (branches) and tags with git ls-remote U.
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You can use this:
git ls-remote U branch | cut -c1-7
where, 'branch' specifies the commit hash from that particular branch
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