Bash alias to wrap around Git commit

I am trying to write a bash alias to wrap around a Git commit command.

Here is what my typical Git commit looks like. git commit -am 'Comments in here'

Here is what I have attempted to write as an alias (which would go inside my .bashrc file), so I don't have to write out the whole command every time.

comm(){

git commit -am $1

}

Then I would call it like this: comm 'Comments in here'

However I keep getting this error: fatal: Paths with -a does not make sense.

Anything I'm missing here?

#bash #git