You can then type git timetrack, git timetrack "1 day", git timetrack "1 month" --reverse (the arguments are positional, so the duration is required in this case) in any git repository!

git-timetracker.sh

# add it to your ~/.gitconfig as an alias:

[alias] 
	timetrack = "!f() { \
         git --no-pager log \
		 	--date=iso \
		 	--since="${1-2 months}$" \
			"${2}" \
		 	--date-order \
		 	--full-history \
		 	--all \
			--pretty=tformat:'%C(cyan)%ad%x08%x08%x08%x08%x08%x08%x08%x08%x08 %C(bold red)%h %C(bold blue)%<(22)%ae %C(reset)%s'; \
       }; f"