Cannot apply stash when there is branch "stash"

[sm-g]

1. create branh "stash"
2. stash any changes
3. try to apply them:

warning: refname 'stash' is ambiguous.
warning: refname 'stash' is ambiguous.
warning: refname 'stash' is ambiguous.
warning: refname 'stash' is ambiguous.
warning: refname 'stash' is ambiguous.
warning: refname 'stash' is ambiguous.

[DanPristupov]

This was a problem in git which is now fixed.