Improve fork information for parent extraction

Signed-off-by: Derek Nola <derek.nola@suse.com>

.github/workflows/e2e.yaml

@@ -166,6 +166,9 @@ jobs:
           fi
         elif [ -z "${{ github.base_ref }}" ]; then
           # We are in a fork, and need some git history to determine the branch name
+          # For some reason, the first fetch doesn't always get the full history, so we sleep and fetch again
+          git fetch origin --depth=100 +refs/heads/*:refs/remotes/origin/*
+          sleep 5
           git fetch origin --depth=100 +refs/heads/*:refs/remotes/origin/*
           BRANCH_NAME=$(git show-branch -a 2> /dev/null  | grep '\*' | grep -v `git rev-parse --abbrev-ref HEAD` | head -n1 |  sed 's/.*\[\(.*\/\)\(.*\)\].*/\2/' | sed 's/[\^~].*//')
         else
@@ -178,6 +181,7 @@ jobs:
       run: |
         if [[ ! ${{ steps.branch_step.outputs.branch_name }} =~ ^(master|release-[0-9]+\.[0-9]+)$ ]]; then
           echo "Branch name ${{ steps.branch_step.outputs.branch_name }} does not match pattern"
+          echo "If this is a PR/fork, ensure you have recently rebased off master/release-1.XX branch"
           exit 1
         fi