Add build script version to spec file

slop.spec.in

@@ -48,3 +48,5 @@ cmake -DCMAKE_INSTALL_PREFIX="/usr" ./
 /usr/include/slop.hpp
 %{_libdir}/libslopy.so
 %{_mandir}/man1/slop.1.gz
+
+# spec file generated from __SLOP_BUILDSCRIPT_VERSION__

trigger_copr

@@ -42,10 +42,13 @@ last_version() {
 }
 
 trigger() {
+    local self_version
+    self_version="slop-build-copr $(git describe --tags)"
     sed -e "
         /^Version/ s|__SLOP_VERSION__|$Version|
         /^Release/ s|__SLOP_RELEASE__|$Release|
         /^Source0/ s|__SLOP_URLBASE__|$UrlBase|
+        /^# spec file/ s|__SLOP_BUILDSCRIPT_VERSION__|$self_version|
     " <slop.spec.in >"$Tmp/slop.spec"
     copr build --nowait "$CoprProject" "$Tmp/slop.spec"
 }