Error fetching changes from Github

[antoineleclair]

While running a deployment, the deployment output showed this:

Deployment 1225 enqueued
Starting deployment
Fetching from github.com/orgname/reponame
Failed to fetch repository. Is the repository accessible?
Deployment failed
Restoring previous deployment

The logs showed this:

INFO:disco.utils.github:Output: error: cannot lock ref 'refs/remotes/origin/branch-name/dev': 'refs/remotes/origin/branch-name' exists; cannot create 'refs/remotes/origin/branch-name/dev'
INFO:disco.utils.github:Output: From https://github.com/orgname/reponame
INFO:disco.utils.github:Output:  ! [new branch]            branch-name/dev -> origin/branch-name/dev  (unable to update local ref)
INFO:disco.utils.github:Output: error: some local refs could not be updated; try running
INFO:disco.utils.github:Output:  'git remote prune origin' to remove any old, conflicting branches
INFO:disco.utils.deployments:Setting deployment status of deployment DEPLOYMENT_0ca8830bcc43458084a36acc01e723ac (dev 1223) to FAILED
 INFO:disco.utils.events:Dispatching event deployment:status: {"id": "2025-10-06T15:43:52.466302+00:00", "timestamp": "2025-10-06T15:43:52.466302+00:00", "type": "deployment:status", "data": {"project": {"name": "dev"}, "deployment": {"number": 1223, "status": "FAILED"}}}
ERROR:disco.utils.deploymentflow:Exception while deploying
Traceback (most recent call last):
  File "/disco/app/disco/utils/deploymentflow.py", line 235, in process_deployment
    await prepare_deployment(
  File "/disco/app/disco/utils/deploymentflow.py", line 315, in prepare_deployment
    await checkout_commit(new_deployment_info, log_output)
  File "/disco/app/disco/utils/deploymentflow.py", line 572, in checkout_commit
    await github.fetch(
  File "/disco/app/disco/utils/github.py", line 204, in fetch
    raise GithubException(f"Git returned status {process.returncode}")
disco.utils.github.GithubException: Git returned status 1

From this

disco-daemon/disco/utils/github.py

Lines 189 to 204 in 13c0416

	args = ["git", "fetch", "origin"]
	process = await asyncio.create_subprocess_exec(
	*args,
	stdout=subprocess.PIPE,
	stderr=subprocess.STDOUT,
	cwd=project_path(project_name),
	)
	assert process.stdout is not None
	async for line in process.stdout:
	line_text = decode_text(line)
	if line_text.endswith("\n"):
	line_text = line_text[:-1]
	log.info("Output: %s", line_text)
	await process.wait()
	if process.returncode != 0:
	raise GithubException(f"Git returned status {process.returncode}")

(running git fetch origin)

I tried running it on the machine, using SSH and got this:

root@machine-name:~/disco/projects/project-name# git fetch origin
error: cannot lock ref 'refs/remotes/origin/branch-name/project-name': 'refs/remotes/origin/branch-name' exists; cannot create 'refs/remotes/origin/branch-name/project-name'
From https://github.com/orgname/reponame
 ! [new branch]            branch-name/project-name -> origin/branch-name/project-name  (unable to update local ref)
error: some local refs could not be updated; try running
 'git remote prune origin' to remove any old, conflicting branches

[antoineleclair]

Going to the repo by SSH and running git remote prune origin fixed the issue for now, but it's something that should be handled by the daemon.