use explicit revisions so i can use the docker build cache

docker/scripts/install-connectors.sh

@@ -3,6 +3,9 @@ set -euxo pipefail
 
 function cmakebuild() {
   cd $1
+  if [[ ! -z "${2:-}" ]]; then
+    git checkout $2
+  fi
   mkdir build
   cd build
   cmake ..
@@ -19,7 +22,7 @@ BUILD_PACKAGES="git cmake make gcc g++ musl-dev"
 apk add --no-cache --virtual .build-deps $BUILD_PACKAGES
 
 
-git clone --depth 1 https://github.com/jketterl/owrx_connector.git
-cmakebuild owrx_connector
+git clone https://github.com/jketterl/owrx_connector.git
+cmakebuild owrx_connector 1a1a8615b4d92827d93d3135556e44b7b0bbc98f
 
 apk del .build-deps