catch exception when determining git branch

src/test/java/net/hostsharing/hsadminng/hs/office/scenarios/TestReport.java

@@ -121,8 +121,14 @@ public class TestReport {
 
     @SneakyThrows
     private String currentGitBranch() {
+        try {
             final var gitRevParse = new SystemProcess("git", "rev-parse", "--abbrev-ref", "HEAD");
             gitRevParse.execute();
             return gitRevParse.getStdOut().split("\\R", 2)[0];
+        } catch (final IOException exc) {
+            // TODO.test: the git call does not work in Jenkins, we have to find out why
+            System.err.println(exc);
+            return "unknown";
+        }
     }
 }