Create source repository:

  $ hg init t

  $ cd t

  $ echo a > a

  $ hg ci -Am a

  adding a

  $ cd ..

Fork source repository:

  $ hg clone t t2

  updating to branch default

  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

  $ cd t2

  $ echo b > b

  $ hg ci -Am b

  adding b

Update source repository:

  $ cd ../t

  $ echo a >> a

  $ hg ci -m a2

Merge repositories:

  $ hg pull ../t2

  pulling from ../t2

  searching for changes

  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)

  $ hg merge

  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

  (branch merge, don't forget to commit)

  $ hg st

  M b

Rename b as c:

  $ hg mv b c

  $ hg st

  A c

  R b

Rename back c as b:

  $ hg mv c b

  $ hg st

  M b

  $ cd ..

  $ hg init repo1476

  $ cd repo1476

  $ echo a > a

  $ hg ci -Am adda

  adding a

  $ echo b1 > b1

  $ echo b2 > b2

  $ hg ci -Am changea

  adding b1

  adding b2

  $ hg up -C 0

  0 files updated, 0 files merged, 2 files removed, 0 files unresolved

  $ echo c1 > c1

  $ echo c2 > c2

  $ hg ci -Am addcandd

  adding c1

  adding c2

  created new head

Merge heads:

  $ hg merge

  2 files updated, 0 files merged, 0 files removed, 0 files unresolved

  (branch merge, don't forget to commit)

  $ hg mv -Af c1 c2

Commit issue 1476:

  $ hg ci -m merge

  $ hg log -r tip -C -v | grep copies

  copies:      c2 (c1)

  $ hg rollback

  rolling back to revision 2 (undo commit)

  $ hg up -C .

  2 files updated, 0 files merged, 2 files removed, 0 files unresolved

Merge heads again:

  $ hg merge

  2 files updated, 0 files merged, 0 files removed, 0 files unresolved

  (branch merge, don't forget to commit)

  $ hg mv -Af b1 b2

Commit issue 1476 with a rename on the other side:

  $ hg ci -m merge

  $ hg log -r tip -C -v | grep copies

  copies:      b2 (b1)