Skip git checkout in all suitable gitlab-ci.yml stages

debian/gitlab-ci.yml

@@ -74,6 +74,8 @@ fresh install:
     - cp -ra /var/log/mysql debug/var-log-mysql
     - mariadb --skip-column-names -e "select @@version, @@version_comment"
     - mariadb -e "create database test; use test; create table t(a int primary key) engine=innodb; insert into t values (1); select * from t; drop table t; drop database test;"
+  variables:
+      GIT_STRATEGY: none
 
 upgrade on stretch:
   stage: upgrades in Debian stable
@@ -106,6 +108,8 @@ upgrade on stretch:
     - cp -ra /var/log/mysql debug/var-log-mysql
     - mariadb --skip-column-names -e "select @@version, @@version_comment"
     - mariadb -e "create database test; use test; create table t(a int primary key) engine=innodb; insert into t values (1); select * from t; drop table t; drop database test;"
+  variables:
+      GIT_STRATEGY: none
 
 test basic features:
   stage: test quality
@@ -153,6 +157,8 @@ test basic features:
     - mariadb -e "SELECT COUNT(*) FROM db.v_temptable"
     - mariadb -e "CALL db.p()"
     - mariadb -e "SELECT db.f()"
+  variables:
+      GIT_STRATEGY: none
 
 # Stanza 'breaks-testbed' must be removed because the test 'upstream' will otherwise be skipped and
 # thus the command would return exit code 2, and be considered failed by Gitlab CI.
@@ -189,6 +195,8 @@ build mariadbclient consumer Python-MySQLdb:
     - pip3 install mysqlclient # Compiles module against libmysqlclient
     - apt-get purge -y libmariadb-dev # Not needed for run-time
     - python3 -c "import MySQLdb; print(MySQLdb.get_client_info())"
+  variables:
+      GIT_STRATEGY: none
 
 mysql-5.5 to mariadb upgrade:
   stage: upgrades in Debian stable
@@ -215,3 +223,5 @@ mysql-5.5 to mariadb upgrade:
     - service mysql status
     - mariadb --version
     - echo 'SHOW DATABASES;' | mariadb
+  variables:
+      GIT_STRATEGY: none