jenkins - 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.