git update-ref refs/heads/master $commit0 &&
git update-ref refs/heads/tofail $commit1 &&
git clone ./. victim &&
+ GIT_DIR=victim/.git git config receive.denyCurrentBranch warn &&
GIT_DIR=victim/.git git update-ref refs/heads/tofail $commit1 &&
git update-ref refs/heads/master $commit1 &&
git update-ref refs/heads/tofail $commit0