[INFO] cloning repository https://github.com/alexwennerberg/crabmail
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/alexwennerberg/crabmail" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falexwennerberg%2Fcrabmail", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falexwennerberg%2Fcrabmail'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4d28fc9fb89ff2db9316ee032efb37a7f4c47a77
[INFO] checking alexwennerberg/crabmail against master#cccf075eba88363269e8589ebb8d40874cc542d8 for pr-142681
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falexwennerberg%2Fcrabmail" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] [stderr] fatal: update_ref failed for ref 'HEAD': cannot update ref 'refs/heads/main': couldn't write '/workspace/builds/worker-7-tc1/source/.git/refs/heads/main.lock'


failed to checkout https://github.com/alexwennerberg/crabmail

Caused by:
    command failed: exit status: 128