Get version for Packit builds from specfile

Packit updates just the release field.

Signed-off-by: Frantisek Lachman <flachman@redhat.com>

.packit.yaml

@@ -8,8 +8,7 @@ actions: &common_actions
     - bash -c "tito build --tgz --test -o ."
     - bash -c "ls -1t ./*.tar.gz | head -n 1"
   get-current-version:
-    - bash -c "git describe --match $PACKIT_CONFIG_PACKAGE_NAME-[0-9]* --abbrev=0 HEAD | egrep -o
-      [0-9]+\.[0-9]+"
+    - bash -c "grep -Po 'Version. +\K.*' *.spec"
 
 packages: