Interface Commit

If true replaces the tip of the current branch by creating a new commit. The recorded tree is prepared as usual, and the message from the original commit is used as the starting point, instead of an empty message, when no other message is specified. The new commit has the same parents and author as the current one. Defaults to false.

Adds the Signed-off-by line by the committer at the end of the commit log message. false by default.