Here is how you read the existing metadata:
exiftool -a -u -g1 IMG_0708.JPG | more
... and here is how you scrub it: exiftool -all= IMG_0708.JPG
(you could read it again, after scrubbing, to demonstrate it is gone ...) stripexif ()
{
exiftool -all= "$@"
}I nearly always scale+compress photos that leave my possession, and usually using convert, so adding -strip is a nice streamlined way of doing all at once.