I know git stores information of when files get deleted and I am able to check individual commits to see which files have been removed but is there a command that would generate a list of every deleted file across a repository's lifespan?
git log --diff-filter=D --summary
If you don't want all the information about which commit they were removed in, you can just add a
grep delete in there.
git log --diff-filter=D --summary | grep delete