zsh:glog: Add --all flag

Pretend as if all the refs in refs/, along with HEAD, are listed on the
command line.

.config/zsh/autoload/glog

@@ -119,6 +119,6 @@ fi
 
 # Display an ascii graph of the commits in the above format and pipe that into
 # fzf.
-git log "$formatshort" --graph "$dateshort" --color=always "$@" \
+git log --all "$formatshort" --graph "$dateshort" --color=always "$@" \
 | fzf "${fzf_args[@]}"
 return 0