-m <msg>::
Set the commit message to be used for the merge commit (in
- case one is created). The 'git fmt-merge-msg' command can be
+ case one is created).
+
+ If `--log` is specified, a shortlog of the commits being merged
+ will be appended to the specified message.
+
+ The 'git fmt-merge-msg' command can be
used to give a good default for automated 'git merge'
invocations.