[arch-general] Need a little help getting started with contributing

Hello everyone! I got a few small patches related to esthetical issues that i would like to send upstream so everyone else can enjoy them. I'm a little bit lost on how i should do this. The packages i've edited is initscripts, mkinitcpio and filesystem. When it comes to initscripts and mkinitcpio i've just cloned the git repositories but i'm not sure how i should send the commits upstream. git push doesn't work since i don't have the right permissions. I've only used github to send pull request before so i'm not that confident in git yet. Can i do the same thing with just the git command? Also, does the filesystem package have a git repository i can use too? Any help getting started would gladly be appreciated! :)