jobs/master…-dahdi: don't use multiple scms plugin

Related: OS#5763
Change-Id: If115116c0d6920c86a50dc43d57a8a925f6db064

jobs/master-builds-dahdi.yml

@@ -29,21 +29,9 @@
       <b>Auto-generated using Jenkins Job Builder. DO NOT EDIT MANUALLY!</b>
 
     scm:
-      - git:
-         basedir: 'dahdi-linux'
-         url: 'https://gerrit.osmocom.org/dahdi-linux'
-         credentials-id: d5eda5e9-b59d-44ba-88d2-43473cb6e42d
-         branches:
-           - 'origin/master'
-         # When the gerrit git repository is configured to wipe-workspace, the
-         # linux.git clone gets removed as well. Cloning the linux repo takes a
-         # long time, so only clean both repos, don't remove them.
-         wipe-workspace: false
-         clean:
-          before: true
-         skip-tag: true
-         submodule:
-           recursive: true
+      # Let jenkins clone the big linux repository and keep it between builds
+      # (wipe-workspace is false). Clone dahdi-linux with code from gerrit in
+      # the shell part below.
       - git:
          basedir: 'linux'
          url: 'https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git'
@@ -60,6 +48,12 @@
 
     builders:
       - shell: |
+          rm -rf dahdi-linux
+          git clone \
+            --depth=1 \
+            https://gerrit.osmocom.org/dahdi-linux
+          git -C dahdi-linux log --oneline
+
           docker run \
             --rm=true \
             -e "KSRC=/linux" \