Add script to refresh koschei groups based on dist-git groups

roles/koschei/backend/files/koschei-refresh-disgit-group

@@ -0,0 +1,7 @@
+#!/bin/bash
+if [ "$#" -ne 2 ]; then
+    echo "Usage: refresh-group <group-name> <distgit-group-name>"
+    exit 1
+fi
+set -e
+curl -s "https://src.fedoraproject.org/api/0/group/${2}?projects=1" | jq -r '.projects[].name' | koschei-admin edit-group "${1}" --content-from-file - --append

roles/koschei/backend/tasks/main.yml

@@ -6,6 +6,7 @@
   - koschei-backend-fedora
   - koschei-backend-copr
   - postgresql
+  - jq
   tags:
   - koschei
   - packages
@@ -105,6 +106,7 @@
     mode=755
   with_items:
   - koschei-refresh-group
+  - koschei-refresh-distgit-group
   - koschei-refresh-module
   tags:
   - koschei

roles/koschei/backend/templates/cron-refresh-groups.j2

@@ -1,6 +1,7 @@
 SHELL=/bin/bash
 MAILTO=sysadmin-koschei-members@fedoraproject.org
 0 0-23/3 * * *   koschei    /usr/local/bin/koschei-refresh-group php 'php*'
+5 0-23/3 * * *   koschei    /usr/local/bin/koschei-refresh-distgit-group rust-sig rust-sig
 
 # I'd use dnf clean, but it leaves stuff behind
 5 1 * * *        koschei    rm -rf /var/tmp/dnf-koschei-*