BranchRef returns a ref for the given branch name.

ParseSHA1 parses a hex-encoded SHA-1 hash.

TagRef returns a ref for the given tag name.

FetchHead records the branch which was fetched from a remote repository with the last git fetch invocation.

Head names the commit on which the changes in the working tree are based.

SHA1Size is the number of bytes in a SHA-1 hash.

A Ref is a Git reference to a commit.

A SHA1 is the SHA-1 hash of a Git object.