gnu: kdevelop-pg-qt: Update to 2.2.1.

* gnu/packages/kde.scm (kdevelop-pg-qt): Update to 2.2.1.
[source]: Download using git-fetch.

gnu/packages/kde.scm

 ;;; GNU Guix --- Functional package management for GNU
-;;; Copyright © 2016, 2017, 2019 Efraim Flashner <efraim@flashner.co.il>
+;;; Copyright © 2016, 2017, 2019, 2020 Efraim Flashner <efraim@flashner.co.il>
 ;;; Copyright © 2016 David Craven <david@craven.ch>
 ;;; Copyright © 2016, 2017 Thomas Danckaert <post@thomasdanckaert.be>
 ;;; Copyright © 2017, 2018 Mark Meyer <mark@ofosos.org>
@@ -302,15 +302,16 @@ (define-public kdevelop
 (define-public kdevelop-pg-qt
   (package
     (name "kdevelop-pg-qt")
-    (version "2.2.0")
+    (version "2.2.1")
     (source
      (origin
-       (method url-fetch)
-       (uri (string-append "https://github.com/KDE/kdevelop-pg-qt/archive/v"
-                           version ".tar.gz"))
-       (file-name (string-append name "-" version ".tar.gz"))
+       (method git-fetch)
+       (uri (git-reference
+              (url "https://github.com/KDE/kdevelop-pg-qt")
+              (commit (string-append "v" version))))
+       (file-name (git-file-name name version))
        (sha256
-        (base32 "15ja19gg6x7gww4ch12hy585x55ghbkpsiyr8fqiyjk0j6v07hh5"))))
+        (base32 "1kfab4p717acbdkcdi41d98vwch7v431gb2qi6s38hmclsf8bf8g"))))
     (native-inputs
      `(("extra-cmake-modules" ,extra-cmake-modules)))
     (inputs