Combines python-inquirer and git-amend-old to make git fix.
This gives you the possibility to amend a specific commit very easily.
Thanks to @magmax and @colinodell
Put the two files in your $PATH.
Then you will be able to do:
$ git fix
when you have staged some changes that you want to integrate to an older commit.
You will need to have python installed and the python libraries
inquirer to be installed.
This has not been tested thoroughly since it is merely a mashup of two tools, so use it as your own risks. git reflog might be your friend.