diff --git a/qemu-testsuite.changes b/qemu-testsuite.changes
index c6be2bcc..bef26870 100644
--- a/qemu-testsuite.changes
+++ b/qemu-testsuite.changes
@@ -1,3 +1,13 @@
+-------------------------------------------------------------------
+Thu Jan  3 14:12:56 UTC 2019 - olaf@aepfle.de
+
+- Modify update_git.sh script:
+  pass --zero-commit to format-patch
+  This removes needless noise in the buildservice when the same set
+  of patches is imported/exported at different times by different users.
+  pass --no-signature to format-patch
+  Remove sed call which used to remove the signature, use mv instead
+
 -------------------------------------------------------------------
 Fri Dec 14 06:24:53 UTC 2018 - lma@suse.com
 
diff --git a/qemu.changes b/qemu.changes
index c6be2bcc..bef26870 100644
--- a/qemu.changes
+++ b/qemu.changes
@@ -1,3 +1,13 @@
+-------------------------------------------------------------------
+Thu Jan  3 14:12:56 UTC 2019 - olaf@aepfle.de
+
+- Modify update_git.sh script:
+  pass --zero-commit to format-patch
+  This removes needless noise in the buildservice when the same set
+  of patches is imported/exported at different times by different users.
+  pass --no-signature to format-patch
+  Remove sed call which used to remove the signature, use mv instead
+
 -------------------------------------------------------------------
 Fri Dec 14 06:24:53 UTC 2018 - lma@suse.com
 
diff --git a/update_git.sh b/update_git.sh
index 4e1782d8..517d7ede 100644
--- a/update_git.sh
+++ b/update_git.sh
@@ -214,6 +214,8 @@ else # not based on LATEST upstream master, rather any upstream commitish
 fi
 
 (cd $GIT_DIR && git format-patch -N --stat=72 --indent-heuristic \
+    --zero-commit \
+    --no-signature \
     $GIT_UPSTREAM_COMMIT_ISH --suffix= -o $CMP_DIR --no-renames >/dev/null)
 
 check_patch()
@@ -241,10 +243,7 @@ rm -rf $GIT_DIR
     # chars before extension and remove git signature. ('30' below gets us past
     # dir prefix)
     for i in $CMP_DIR/*; do
-        # format-patch may append a signature, which per default contains the
-        # git version. wipe everything starting from the signature tag
-        sed '/^-- $/Q' $i > $CMP_DIR/${i:30:40}.patch
-        rm $i
+        mv $i $CMP_DIR/${i:30:40}.patch
     done
 
     for i in 0???-*.patch; do