I’m trying to create merge requests using GraphQL mutation
mergeRequestCreate. That works fine for creation of merge requests within the same repository (both target and source branches belong to the same repository). I’m struggling to create a cross-repository merge request between forked child and fork parent. I can’t figure out how to specify
sourceBranch input parameter. I tried to prefix it with the source repository namespace (like
dmilke:branch_name, which works on some other hosting services), but I get
Source branch is invalid error.
I’d appreciate if anyone can help me with this. Thanks.