Suppose my GitHub project requires DCO.
In case of DCO, for a "proof" of origin it's usually enough to add a commit message that includes Signed-off-by
line.
But in case of GitHub it's very easy to identify the committer anyway, assuming all commits are done by GitHub users. In such case, is there any legal benefit to a "Signed-off-by" line in the commit, vs simply identifying the GitHub account related to that commit?