build: Fetch latest spec from Fedora

To get `zstd-devel`.

Author: cgwalters

hack/build.sh

@@ -5,4 +5,8 @@ case $ID in
   centos|rhel) dnf config-manager --set-enabled crb;;
   fedora) dnf -y install dnf-utils ;;
 esac
-dnf -y builddep bootc
+# Fetch the latest spec from fedora to ensure we've got the latest build deps
+t=$(mktemp)
+curl -L -o ${t} https://src.fedoraproject.org/rpms/bootc/blob/rawhide/f/bootc.spec
+dnf -y builddep "${t}"
+rm -f "${t}"