Find renames (backwards)

$ touch hello
$ echo hello >hello
$ git add hello
$ git commit -mcommit
$ git mv hello hola
$ git commit -mcommit
$ git mv hola goodbye
$ git commit -mcommit
$ git mv goodbye aufwiedersehen
$ git commit -mcommit
$ ./find-backwards.py hello
File ‘hello’ was renamed to ‘hola’ in commit 1168ac590cc9ab2ab0694265f6b065c2644e79e4
File ‘hola’ was renamed to ‘goodbye’ in commit 5430e47f06169ed962ce9366f3e520ef891c986c
File ‘goodbye’ was renamed to ‘aufwiedersehen’ in commit 4db7cd96a9fa4d56de3f06b42d3a283c9c3c81ee