Error using local git branches in workflow

[Mohit Dalvi (mcdalvi)]

Hello,

I am trying to use a local git branch (working copy in FCM speak) in a workflow based on the Example ones using Git sources.

I am using the localmirrors option and In the dependencies.yaml I have:

'''
ukca:

• source: git@github.com:MetOffice/ukca.git
  ref: 2025.12.1
• source: caXXX:/path/to/local/git/sources/ukca.git
  ref: um14.0_test_branch
  '''
  However, this fails in the extract task with:

`Cloning ukca from localmirrors: at ref 2025.12.1
`INFO:get_git_sources:[2026-02-17 11:08:38] Merging caXXX:/path/to/local/git/source/ukca.git at ref um14.0_test_branch into ukca
ERROR:get_git_sources:[FAIL] Command failed: git -C ~/cylc-run/u-dw675/run3/share/source/ukca fetch local caXXX:/um14.0_test_branch
Error: fatal: invalid refspec 'caXXXX:/um14.0_test_branch'

Is there an example syntax available somewhere to use local git sources ?

Thanks

Mohit

[James Bruten (james-bruten-mo)]

Hi Mohit, thanks for raising. This hit a bug in the extract script. I've fixed that, so you should be clear to try again.

[Mohit Dalvi (mcdalvi)]

Thanks James, extract step is working now !