When you have a .git folder and want to see a history of all the commits:
git log --patch
View specific commit hashes:
If you want to carve out files from a disk image, try using foremost.
Note that foremost will print out the binaries to the console which may crash it - make sure to redirect output somewhere.
foremost image -o
To understand which keys were pressed in a USB Wireshark PCAP, try this script.