\--all::
Instead of explicitly specifying which refs to update,
- update all refs that locally exist.
+ update all heads that locally exist.
\--force::
Usually, the command refuses to update a remote ref that
the remote side. You cannot specify any '<ref>' if you use
this flag.
-Without '--all' and without any '<ref>', the refs that exist
+Without '--all' and without any '<ref>', the heads that exist
both on the local side and on the remote side are updated.
When one or more '<ref>' are specified explicitly, it can be either a