Shows how I generate my markdown release notes using git commits

.gitconfig

[alias]
  co = checkout
  tagsbydate = for-each-ref --sort=-taggerdate --format='%(refname:short)' refs/tags
  previoustag = !sh -c 'git tagsbydate --count 2 | cut -f2 | sed -n 2p'
  lg = log --color --graph --pretty=format:'%Cred%h%Creset -%C(yellow)%d%Creset %s %Cgreen(%cr) %C(bold blue)<%an>%Creset' --abbrev-commit --
  markdownlog = log --color --pretty=format:'* %s `%Cred%h%Creset` - %C(bold blue)[%an](mailto:%ae)%Creset' --abbrev-commit --dense --no-merges --reverse
  releasenotes = !sh -c 'git markdownlog ...`git previoustag`'

Thank's for nice git aliases, you can get latest previous tag like that:

git describe --tags --abbrev=0

That's really useful (and more concise!) - thanks @OzzyCzech