$ hg tip
changeset:
tag: tip
user: Bryan O'Sullivan <bos@serpentine.com>
summary: first change
$ hg qnew first.patch
$ hg tip
changeset:
tag: qtip
tag: first.patch
tag: tip
tag: qbase
user: Bryan O'Sullivan <bos@serpentine.com>
summary: [mq]: first.patch
$ ls .hg/patches
first.patch series status