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[BUG] --no-cache is not respected for git sources #2924

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@willarmiros

Description

Description

I have a service in a docker compose that builds using a Dockerfile in a remote git repo, defined like so:

services:
  my-service:
      container_name: my-service
      build:
        context: [email protected]:protectai/my-repo.git#main
        dockerfile: Dockerfile
        ssh:
          - default

When re-building a service with the --no-cache flag, I would expect caching to be skipped for ALL parts of the build, including making a fresh call to retrieve the source code from git. However this is not the case, as I can see in the first line of the output:

=> CACHED [internal] load git source [email protected]:protectai/my-repo.git#main                                                       8.9s

I also confirmed that the contents of the container/service are an outdated version of content in that repo. When I change the git ref to be a commit hash or some branch other than main, it then actually re-pulls from the git source as I expect. For example:

=> [internal] load git source [email protected]:protectai/my-repo.git#75e9ec67c74dcddd8cd22c3f3c6ecb947ba55f2a                          2.3s

After changing the ref to the latest commit in the repo, I confirmed the service was actually updated with the latest source code. My ask is for the --no-cache flag to do this for me without needing to make manual changes.

Steps To Reproduce

Have a compose file like:

services:
  my-service:
      container_name: my-service
      build:
        context: [email protected]:protectai/my-repo.git#main
        dockerfile: Dockerfile
        ssh:
          - default

Run docker compose build --no-cache my-service

See in the first line of the output:

=> CACHED [internal] load git source [email protected]:protectai/my-repo.git#main                                                       8.9s

Compose Version

Docker Compose version v2.17.3

Docker Environment

Client:
 Context:    desktop-linux
 Debug Mode: false
 Plugins:
  buildx: Docker Buildx (Docker Inc.)
    Version:  v0.10.4
    Path:     /Users/williamarmiros/.docker/cli-plugins/docker-buildx
  compose: Docker Compose (Docker Inc.)
    Version:  v2.17.3
    Path:     /Users/williamarmiros/.docker/cli-plugins/docker-compose
  dev: Docker Dev Environments (Docker Inc.)
    Version:  v0.1.0
    Path:     /Users/williamarmiros/.docker/cli-plugins/docker-dev
  extension: Manages Docker extensions (Docker Inc.)
    Version:  v0.2.19
    Path:     /Users/williamarmiros/.docker/cli-plugins/docker-extension
  init: Creates Docker-related starter files for your project (Docker Inc.)
    Version:  v0.1.0-beta.4
    Path:     /Users/williamarmiros/.docker/cli-plugins/docker-init
  sbom: View the packaged-based Software Bill Of Materials (SBOM) for an image (Anchore Inc.)
    Version:  0.6.0
    Path:     /Users/williamarmiros/.docker/cli-plugins/docker-sbom
  scan: Docker Scan (Docker Inc.)
    Version:  v0.26.0
    Path:     /Users/williamarmiros/.docker/cli-plugins/docker-scan
  scout: Command line tool for Docker Scout (Docker Inc.)
    Version:  v0.10.0
    Path:     /Users/williamarmiros/.docker/cli-plugins/docker-scout

Server:
 Containers: 7
  Running: 5
  Paused: 0
  Stopped: 2
 Images: 37
 Server Version: 23.0.5
 Storage Driver: overlay2
  Backing Filesystem: extfs
  Supports d_type: true
  Using metacopy: false
  Native Overlay Diff: true
  userxattr: false
 Logging Driver: json-file
 Cgroup Driver: cgroupfs
 Cgroup Version: 2
 Plugins:
  Volume: local
  Network: bridge host ipvlan macvlan null overlay
  Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog
 Swarm: inactive
 Runtimes: io.containerd.runc.v2 runc
 Default Runtime: runc
 Init Binary: docker-init
 containerd version: 2806fc1057397dbaeefbea0e4e17bddfbd388f38
 runc version: v1.1.5-0-gf19387a
 init version: de40ad0
 Security Options:
  seccomp
   Profile: builtin
  cgroupns
 Kernel Version: 5.15.49-linuxkit
 Operating System: Docker Desktop
 OSType: linux
 Architecture: aarch64
 CPUs: 5
 Total Memory: 7.667GiB
 Name: docker-desktop
 ID: 1d550563-0ff9-47f6-a6eb-4014a3cd7bc2
 Docker Root Dir: /var/lib/docker
 Debug Mode: false
 HTTP Proxy: http.docker.internal:3128
 HTTPS Proxy: http.docker.internal:3128
 No Proxy: hubproxy.docker.internal
 Registry: https://index.docker.io/v1/
 Experimental: false
 Insecure Registries:
  hubproxy.docker.internal:5555
  127.0.0.0/8
 Live Restore Enabled: false

Anything else?

No response

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