Address review feedback

scripts/rpc_repo_to_horizon_repo.sh

@@ -0,0 +1,31 @@
+#!/usr/bin/env bash
+
+# rpc_repo_to_horizon_repo.sh - given an rpc branch to horizon branch
+#
+# Syntax:   rpc_repo_to_horizon_repo.sh <rpc_branch_name>
+#
+# Examples: rpc_repo_to_horizon_repo.sh main
+
+set -e
+set -o pipefail
+
+if [ "$#" -ne 1 ]; then
+    echo "Syntax: ${0} <rpc_branch_name>"
+    exit 1
+fi
+
+GO_MONOREPO=github.com/stellar/go
+RPC_BRANCH=$1
+RPC_REPO_GOMOD=https://raw.githubusercontent.com/stellar/stellar-rpc/${RPC_BRANCH}/go.mod
+
+# find the short commit from the stellar-rpc repository.
+SHORT_COMMIT=$(curl -s ${RPC_REPO_GOMOD} -o - | grep "${GO_MONOREPO} " | cut -d- -f3)
+
+# find the long commit from the actual go repository using the short commit.
+TEMPDIR=$(mktemp -d)
+git clone -q https://${GO_MONOREPO}.git ${TEMPDIR}
+CURRENT_DIR=$(pwd)
+cd ${TEMPDIR}
+git rev-parse ${SHORT_COMMIT}
+rm -rf ${TEMPDIR}
+cd ${CURRENT_DIR}