jobs/updateSrcRev: just make git reset HEAD after updating src rev

Signed-off-by: Marc Mattmüller <marc.mattmueller@netmodule.com>

jobs/Jenkinsfile_UpdateSrcRevisions

@@ -102,10 +102,7 @@ def commitAndPushTheChanges(commonHelpers, repoDir) {
 
       if(params.DRY_RUN) {
         println "DRY RUN: commit message = '${commitMsg}'\n         changes = ${changedItems}"
-        sh(script: """
-          git reset HEAD * > /dev/null
-          git checkout * > /dev/null
-          """)
+        sh(script: "git reset HEAD > /dev/null")
       }
       else {
         println "ToDo: commit and push the changes"