git filter-branch doesn't dereference annotated tags

Hello,

I noticed git-filter-branch doesn't dereference annotated tags prior
to invoking git update-ref -d.

Please find a patch attached that changes the call to git update-ref:

-git update-ref -m "filter-branch: delete" -d "$ref" $sha1
+git update-ref -m "filter-branch: delete" -d $(git rev-parse --verify
"$ref^{commit}") $sha1

Regards,
Gregory