Merge pull request #8011 from valeriosetti/improve-outcome-analysis

Improve `outcome-analysis.sh` script

docs/architecture/psa-migration/outcome-analysis.sh

@@ -43,8 +43,11 @@ record() {
     fi
 }
 
-# save current HEAD
-HEAD=$(git branch --show-current)
+# save current HEAD.
+# Note: this can optionally be updated to
+#   HEAD=$(git branch --show-current)
+# when using a Git version above 2.22
+HEAD=$(git rev-parse --abbrev-ref HEAD)
 
 # get the numbers before this PR for default and full
 cleanup