Answer by Senthil A Kumar for How to recover a dropped stash in Git?

To get the list of stashes that are still in your repository, but not reachable any more:

git fsck --unreachable | grep commit | cut -d"" -f3 | xargs git log --merges --no-walk --grep=WIP

If you gave a title to your stash, replace "WIP" in -grep=WIP at the end of the command with a part of your message, e.g. -grep=Tesselation.

The command is grepping for "WIP" because the default commit message for a stash is in the form WIP on mybranch: [previous-commit-hash] Message of the previous commit.