Merge pull request 'lib: retry git fetch a few times' (#178) from earl-warren/end-to-end:wip-codeberg-retry into main

Reviewed-on: https://code.forgejo.org/forgejo/end-to-end/pulls/178
Reviewed-by: thefox <thefox@noreply.code.forgejo.org>

lib/build.sh

@@ -25,6 +25,11 @@ fi
 if ! [[ "$ref" =~ ^refs/ ]] ; then
     ref=refs/heads/$ref
 fi
+for retry in 1 2 3 ; do
+    timeout 15m git fetch --update-head-ok origin +$ref:$ref && break
+    echo "Retry git fetch in 60 seconds"
+    sleep 60
+done
 git fetch --update-head-ok origin +$ref:$ref
 git switch --force-create $v $ref