Temporarily disable shallow clone of postgres source repo

This might lead to the same commit hash showing up on the buildfarm
server logs, but this is just a random guess at this point.

.github/workflows/run.yaml

@@ -46,7 +46,8 @@ jobs:
           path: source
           # TODO: Change to shallow-since once this is solved:
           # https://github.com/actions/checkout/issues/947
-          fetch-depth: 100
+          # TODO: This possibly breaks reporting of the correct commit hash to the build farm server
+          # fetch-depth: 100
       - uses: actions/cache@0c45773b623bea8c8e75f6c82b208c3cf94ea4f9 # v4.0.2
         with:
           path: build