Copied from https://stackoverflow.com/questions/953481/find-and-restore-a-deleted-file-in-a-git-repository

Find the last commit that affected the given path. As the file isn't in the HEAD commit, this commit must have deleted it.

    git rev-list -n 1 HEAD -- <file_path>

Then checkout the version at the commit before, using the caret (`^`) symbol:

    git checkout <deleting_commit>^ -- <file_path>

Or in one command, if `$file` is the file in question.

    git checkout $(git rev-list -n 1 HEAD -- "$file")^ -- "$file"

---
If you are using zsh and have the EXTENDED_GLOB option enabled, the caret symbol won't work. You can use `~1` instead.

    git checkout $(git rev-list -n 1 HEAD -- "$file")~1 -- "$file"