branch-preserver.patch

   1 --- gitlab-runner-13.12.0/src/gitlab.com/gitlab-org/gitlab-runner/shells/abstract.go~   2021-05-20 18:01:08.000000000 +0300
   2 +++ gitlab-runner-13.12.0/src/gitlab.com/gitlab-org/gitlab-runner/shells/abstract.go    2021-09-06 17:21:01.502430880 +0300
   3 @@ -386,7 +386,11 @@
   4
   5  func (b *AbstractShell) writeCheckoutCmd(w ShellWriter, build *common.Build) {
   6         w.Noticef("Checking out %s as %s...", build.GitInfo.Sha[0:8], build.GitInfo.Ref)
   7 -       w.Command("git", "checkout", "-f", "-q", build.GitInfo.Sha)
   8 +       if build.GitInfo.RefType == common.RefTypeTag {
   9 +               w.Command("git", "checkout", "-f", "-q", build.GitInfo.Sha)
  10 +       } else {
  11 +               w.Command("git", "checkout", "-fq", "-B", build.GitInfo.Ref, build.GitInfo.Sha)
  12 +       }
  13
  14         cleanFlags := build.GetGitCleanFlags()
  15         if len(cleanFlags) > 0 {