Simple way to create a tag via git shell and push it to repo

create_github_tag.sh

# creat a tag (more infos at: http://git-scm.com/book/de/ch2-12.html)
git tag -a 1.0.0 -m "Version 1.0.0"
git push origin 1.0.0

git tag -a 1.0.0.alpha1 -m "Version 1.0.0 alpha1"
git push origin 1.0.0.alpha1

# delete a tag
git tag -d 1.0.0
git push origin :refs/tags/1.0.0

Amending the commit message

git commit --amend
git push -f

Clean .git folder

git reflog expire --expire=now --all
git repack -ad
git prune