[INFO] cloning repository https://github.com/iamdanfox/qwirkler
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/iamdanfox/qwirkler" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fiamdanfox%2Fqwirkler", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fiamdanfox%2Fqwirkler'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0e3cdd0bfd61ced33684c54a0d657d13b1becf3d
[INFO] checking iamdanfox/qwirkler against master#5a45ab9738330fb317d49e3594c2db5248b1e971 for pr-136303
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fiamdanfox%2Fqwirkler" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] [stderr] fatal: update_ref failed for ref 'HEAD': cannot update the ref 'refs/heads/master': unable to create directory for '/workspace/builds/worker-4-tc1/source/.git/logs/refs/heads/master': No such file or directory


failed to checkout https://github.com/iamdanfox/qwirkler

Caused by:
    command failed: exit status: 128