Git config with conditional to test Git version

.gitconfig

[alias]
  lg = "!if (( \
      $(echo \"$(git --version | sed -E 's/git version ([0-9]+.[0-9]+).*/\\1/') > 2.20\" | bc) \
    )); then \
      DATE="--date=human"; \
    else \
      DATE="--date=short"; \
    fi; \
    git log --pretty=tiny --abbrev-commit --$DATE"

[pretty]
  tiny = format:%C(dim yellow)%h %C(dim blue)%<(16)%ad %C(italic dim black)%>(16,trunc)%an%C(auto) %s%d