Add an option '-C|--copies' to hg status to show the source of copied files.
Copied files are displayed in the form:
A newname
oldname
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
removing b
this update spans a branch affecting the following files:
b
aborting update spanning branches!
(use 'hg merge' to merge across branches or 'hg update -C' to lose changes)