[Bitbucket]: Create new PR with remote doesn't list remote branches

[jeremyfiel]

Describe the bug
Create a PR with upstream remote, the dropdown list of source branches is not populated correctly.

To Reproduce

1. Add an upstream remote to your repo
2. Create a new PR with the extension
3. The dropdown should show your origin and upstream and the list of branches for the default list selection, in this case, origin
4. Change the Remote to upstream and the Source Branch dropdown does not update with the correct branch list
5. No debug output is available.

Expected behavior
I want to see the list of branches available on the remote

Screenshots

origin

remote

Environment and Version (please complete the following information):

• Atlassian Plugin Version (3.4.9)
• Visual Studio Code Version (x.x.x)
• Is this a local or cloud environment? (Cloud | Local)
• If Cloud, Browser (chrome, safari)
• If Local, OS (macOS, windows, linux)

Additional context
Add any other context about the problem here.

[jeremyfiel]

possibly related #139

[jeremyfiel]

hi Marco any news on this one?

[jeremyfiel]

Please fix this one.

Here's more output of a recent error

[2026-02-18 17:00:20:592] pushing local changes for branch: fix/workers-title-collision to remote: da  
[2026-02-18 17:00:22:346] ----------------------------------------------------------------------
[2026-02-18 17:00:22:346] curl -X POST "https://<customdomain>com/rest/api/1.0/projects/aal/repos/<repo>/pull-requests?markup=true&avatarSize=64" -H "Accept:application/json, text/plain, */*" -H "Content-Type:application/json" -H "User-Agent:atlascode/2.x axios/0.19.2" -H "Authorization:Basic <token>" --data '{"title":"fix(schemas): resolve title collision for code generation","description":"[APIDESGN-3714]\n","fromRef":{"id":"fix/workers-title-collision","repository":{"slug":"<repo>","project":{"key":"aal"}}},"toRef":{"id":"develop"},"reviewers":[{"user":{"name":"<name>"}},{"user":{"name":"<name>"}},{"user":{"name":"<name>"}}],"draft":false}'
[2026-02-18 17:00:22:346] ----------------------------------------------------------------------
[2026-02-18 17:00:23:050] Error creating pull request [object Object]
[2026-02-18 17:00:29:607] Retrieving auth info for product: jira credentialID: <token>
[2026-02-18 17:00:29:607] Clearing notifications for uri file:///Please%20login%20to%20Jira
[2026-02-18 17:00:29:607] No notifications for delegate [object Object]
[2026-02-18 17:00:29:607] No notifications for delegate [object Object]

The error in this image indicates Upstream branch "origin/fix/workers-title-collision" not found

It's right, the branch doesn't exist on origin because it's on the remote da

The validation check here assumes everything is on origin and doesn't consider the source remote name nor the forking strategy functionality.

The root of this issue still remains that the remote list of branches doesn't properly update and the POST request to create the PR doesn't seem to capture the remote defined for the fromRef object.