Git PullRequest job failed. Couldn't find any revision to build. Verify the repository and branch configuration for this job

Question

Yesterday my pullrequest jobs failed with the following output:

11:07:41  > git rev-parse origin/${sha1}^{commit} 11:07:41  > git rev-parse ${sha1}^{commit} 11:07:41 ERROR: Couldn't find any revision to build. Verify the repository and branch configuration for this job. 

I have made an investigation and saw that in property ${sha1} there was nothing. When i paste an absolute path to pull request builder like pr/341/merge instead of ${sha1} the build works. What it can be?

Git Client Plugin 1.9.0

GitHub API Plugin 1.44

Answer 1

I spent a long time on this. The above comment "if I leave this field blank" worked like a charm. In SCM:
1) select Git
2) Name: origin
3) Refspec: +refs/pull/*:refs/remotes/origin/pr/*
4) Branches to build : leave blank

This solved the above error.

Answer 2

According to this, Github branch's default name have been changed from "master" to "main".

So, when creating new jobs for a new repository, you have to set "main" as the branch name instead of "master".

Note that github has way to set "master" (or any other name of your convenience) as default branch name.