How to delete a stash created with git stash create?

If you are 100% sure that you have just one stash or you want to delete all stashes (make a git stash list to be 107% sure), you can do a:

git stash clear

..and forget about them (it deletes all stashes).

Note: Added this answer for those who ended up here looking for a way to clear them all (like me).

git stash drop takes no parameter - which drops the top stash - or a stash reference which looks like: stash@{n} which n nominates which stash to drop. You can't pass a commit id to git stash drop.

git stash drop            # drop top hash, stash@{0}
git stash drop stash@{n}  # drop specific stash - see git stash list

Dropping a stash will change the stash@{n} designations of all stashes further down the stack.

I'm not sure why you think need to drop a stash because if you are using stash create a stash entry isn't created for your "stash" so there isn't anything to drop.

To delete a normal stash created with git stash , you want git stash drop or git stash drop stash@{n}. See below for more details.

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You don't need to delete a stash created with git stash create. From the docs:

Create a stash entry (which is a regular commit object) and return its object name, without storing it anywhere in the ref namespace. This is intended to be useful for scripts. It is probably not the command you want to use; see "save" above.

Since nothing references the stash commit, it will get garbage collected eventually.

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A stash created with git stash or git stash save is saved to refs/stash, and can be deleted with git stash drop. As with all Git objects, the actual stash contents aren't deleted from your computer until a gc prunes those objects after they expire (default is 2 weeks later).

Older stashes are saved in the refs/stash reflog (try cat .git/logs/refs/stash), and can be deleted with git stash drop stash@{n}, where n is the number shown by git stash list.