commit command. Usage: First, move file to /usr/local/bin. Then, "gc" cmd will be available, to which you should pass the git commit msg.

ga

# git add all files and amend to last commit, leaving no message behind and pushing to upstream branch.
git add . && git commit --amend --no-edit && git push --force-with-lease

gc

#!/bin/bash
git add . && git commit -m "$@" && git push