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}^{co
According to this Github branch default name was changed from "master" to "main".
So, when creating new jobs for newly repositories 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.