[INFO] cloning repository https://github.com/marcofpadeiro/benchmark_helper
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/marcofpadeiro/benchmark_helper" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmarcofpadeiro%2Fbenchmark_helper", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmarcofpadeiro%2Fbenchmark_helper'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a62a3fd0f95dc54f2a101b88ff61a284201118b3
[INFO] checking marcofpadeiro/benchmark_helper against master#96cfc75584359ae7ad11cc45968059f29e7b44b7 for pr-137728
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmarcofpadeiro%2Fbenchmark_helper" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] [stderr] error: Unable to create '/workspace/builds/worker-6-tc1/source/.git/refs/remotes/origin/HEAD.lock': No such file or directory
[INFO] [stderr] fatal: unable to update refs/remotes/origin/HEAD


failed to checkout https://github.com/marcofpadeiro/benchmark_helper

Caused by:
    command failed: exit status: 128