map alt+delete in git-bash inputrc

Does anyone know how to bind key combinations with Alt in inputrc in git-bash?

I want to map a key combination Alt+delete to kill-word, but when I press Ctrl+V and Alt+delete to see what characters it represents, it simply shows ^[, which is wrong.

I know that in order to bind Ctrl+Left Arrow to something I can press Ctrl+V, which will type ^[[1;5D and then replace ^[ with \e and finally write add this line to .inputrc:

"\e[1;5D": forward-word

But this method doesn't work for me with Alt+(literally anything).

This answer works on Ubuntu, but stty raw doesn't work in git-bash apparently.

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