git log --since 2017/12/01 --until 2017/12/07 --oneline
# Logs last week in Linux
git log --since "`date -d '1 week ago' '+%Y/%m/%d'`" --oneline
# Logs last week in OSX
git log --since "`date -v-1w '+%Y/%m/%d'`" --oneline
git log --author 'John Doe'