Using adb with a rooted mobile, a common method to pull files only accessible to root (like the ones in /data/data) is moving those files with root to the SDCard attached to the mobile (which is formated with FAT32 and thus doesn't have file permission restrictions) and then adb pull those files from the SDCard.
The problem arises when the used device doesn't have a SDCard slot (as the moto G first genereation), so is it possible to pull to the host some files located in the directory /data/data (which is only accessible with root) without using an SDCard?