--contains <commit>::
Only list branches which contain the specified commit.
---merged::
- Only list branches which are fully contained by HEAD.
+--merged [<commit>]::
+ Only list branches whose tips are reachable from the
+ specified commit (HEAD if not specified).
---no-merged::
- Do not list branches which are fully contained by HEAD.
+--no-merged [<commit>]::
+ Only list branches whose tips are not reachable from the
+ specified commit (HEAD if not specified).
<branchname>::
The name of the branch to create or delete.