'git clean command with exclude does not work when ran as an alias

I run the following command in osx

git clean -dfX --exclude="\!.npmrc" --exclude="\!app-config.local.yaml"

Then neither file is removed.

If I create an alias like this and run gcnn then no files are removed

alias gcn='git clean -dfX --exclude="\!.npmrc" --exclude="\!app-config.local.yaml"'

Is there a difference I am missing?

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