script/ceph-backport.sh: Fix verification of git repository

In git 2.16 running "git show-ref HEAD" returns an error and
prevents the script to procced.

Signed-off-by: Tiago Melo <tmelo@suse.com>

diff --git a/src/script/ceph-backport.sh b/src/script/ceph-backport.sh
index 35d2015a4791e7ea463bd57339ae6b502b7b5605..40e4fb915199dfcd6c3af8dd8acffc3be3f970dd 100755 (executable)
--- a/src/script/ceph-backport.sh
+++ b/src/script/ceph-backport.sh
@@ -465,7 +465,7 @@ function warning {
 # are we in a local git clone?
 #
 
-if git show-ref HEAD >/dev/null 2>&1 ; then
+if git status >/dev/null 2>&1 ; then
     debug "In a local git clone. Good."
 else
     error "This script must be run from inside a local git clone"