object=$(git rev-parse --verify --default HEAD "$@") || exit 1
type=$(git cat-file -t $object) || exit 1
-tagger=$(git-var GIT_COMMITTER_IDENT) || exit 1
+tagger=$(git var GIT_COMMITTER_IDENT) || exit 1
test -n "$username" ||
username=$(git config user.signingkey) ||