gitlab: make check-[dco|patch] a little more verbose

When git fails the rather terse backtrace only indicates it failed
without some useful context. Add some to make the log a little more
useful.

Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20241023113406.1284676-11-alex.bennee@linaro.org>
(cherry picked from commit 97f116f9c6)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
(Mjt: context fix for stable-7.2)

.gitlab-ci.d/check-dco.py

@@ -19,10 +19,9 @@ cwd = os.getcwd()
 reponame = os.path.basename(cwd)
 repourl = "https://gitlab.com/%s/%s.git" % (namespace, reponame)
 
+print(f"adding upstream git repo @ {repourl}")
 subprocess.check_call(["git", "remote", "add", "check-dco", repourl])
-subprocess.check_call(["git", "fetch", "check-dco", "stable-7.2"],
-                      stdout=subprocess.DEVNULL,
-                      stderr=subprocess.DEVNULL)
+subprocess.check_call(["git", "fetch", "check-dco", "stable-7.2"])
 
 ancestor = subprocess.check_output(["git", "merge-base",
                                     "check-dco/stable-7.2", "HEAD"],

.gitlab-ci.d/check-patch.py

@@ -19,13 +19,12 @@ cwd = os.getcwd()
 reponame = os.path.basename(cwd)
 repourl = "https://gitlab.com/%s/%s.git" % (namespace, reponame)
 
+print(f"adding upstream git repo @ {repourl}")
 # GitLab CI environment does not give us any direct info about the
 # base for the user's branch. We thus need to figure out a common
 # ancestor between the user's branch and current git master.
 subprocess.check_call(["git", "remote", "add", "check-patch", repourl])
-subprocess.check_call(["git", "fetch", "check-patch", "master"],
-                      stdout=subprocess.DEVNULL,
-                      stderr=subprocess.DEVNULL)
+subprocess.check_call(["git", "fetch", "check-patch", "master"])
 
 ancestor = subprocess.check_output(["git", "merge-base",
                                     "check-patch/master", "HEAD"],