The man page says 1) Under "Description" https://git-scm.com/docs/git-branch#_description
The |-c| and |-C| options have the exact same semantics as |-m| and |-M|, except instead of the branch being renamed, it will be copied to a new name, along with its config and reflog.
But on the option itself https://git-scm.com/docs/git-branch#Documentation/git-branch.txt--c
-c
--copy
Copy a branch and the corresponding reflog.
The latter does not mention the config. So does it copy the config or not ?
