+ hg init
+ hg add a
+ hg commit -m a -u a -d 0 0
+ hg init
+ hg add b
+ hg commit -m b -u b -d 0 0
+ hg pull ../a
pulling from ../a
searching for changes
warning: pulling from an unrelated repository!
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files
(run 'hg update' to get a working copy)
+ hg heads
changeset:   1:9a79c33a9db3
tag:         tip
user:        a
date:        Thu Jan  1 00:00:00 1970
summary:     a

changeset:   0:01f8062b2de5
user:        b
date:        Thu Jan  1 00:00:00 1970
summary:     b