pulling from ../a
searching for changes
abort: repository is unrelated
pulling from ../a
searching for changes
warning: repository is unrelated
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files (+1 heads)
(run 'hg heads' to see heads, 'hg merge' to merge)
changeset:   1:9a79c33a9db3
tag:         tip
parent:      -1:000000000000
user:        a
date:        Thu Jan 01 00:00:00 1970 +0000
summary:     a

changeset:   0:01f8062b2de5
user:        b
date:        Thu Jan 01 00:00:00 1970 +0000
summary:     b