*stagepkg* allows to move Debian packages between different mini-dinstall[1]
managed repositories.  This is usually used to stage a package from one quality
stage to another. E.g.  if you have the stages 'unstable', 'testing' and
'stable' for a software component you could use:

  stagepkg -f foo/unstable -t foo/testing -k 0x3f3e6426 bar

to move package bar from the repository foo/unstable to foo/testing.

[1] https://packages.debian.org/wheezy/mini-dinstall