I am using Git in Android Studio on a OS X machine, and I would like to have a personal .gitignore file that overrides the .gitignore that are in the project (I want mine to ignore .iml files). Can this be done and how?

I have tried to create a .gitignore file in my home dir with the following lines in:

# Android Studio
.*.iml
*.iml

And the I have used this command to make git use my file git config --global core.excludesfile ~/.gitignore, but it does not work.

Any ideas?