How to recover file changes discarded with fugitive_X in the fugitive summary buffer?

Question

In the fugitive summary buffer, the powerful X command does as explained in :help fugitive_X:

Discard the change under the cursor. This uses checkout or clean under the hood. A command is echoed that shows how to undo the change. Consult :messages to see it again. You can use this during a merge conflict do discard "our" changes (--theirs) in the "Unstaged" section or discard "their" changes (--ours) in the "Staged" section.

I used X mistakenly then closed Vim because I was in a hurry. I had 5 changed files in the repository and I'm a bit sad to have lost those changes. It's a note taking repository with the effort of a few days (I know I should have committed earlier, it's not my main work, just notes on the side). A help hint in the message bar says to use the following to recover one file. I tested and managed to recover it.

:Gsplit art/music.md|Gread 124cdf331a4

Can I recover the other files checked out before that test? I didn't see the message back then and :message only prints message for the active vim session. How do I find out about fugitive messages printed in previous sessions? What are those hash numbers?

Answer 1

You have almost certainly lost the :messages. I am not aware of any builtin messages persistence.

However, if fugitive or git managed to save the blobs, you could try to find them with git fsck (check --unreachable or --dangling) or else just poking around in the list of blobs (https://stackoverflow.com/q/1595631/4400820). Test each with git cat-file -p <sha>; if it is correct, you can git cat-file blob <sha> >/path/to/the/file or similar to restore the file.