fix(netlify-plugin-branch-sync): use 'origin/${SYNC_SOURCE}' instead of 'HEAD' as push source in refspec

apps/scandic-web/netlify-plugin-branch-sync/index.js

@@ -132,7 +132,13 @@ export const onPreBuild = async function ({ utils }) {
 
       for (let i = 0; i < SYNC_DEST.length; ++i) {
         const branch = SYNC_DEST[i]
-        await run("git", ["-C", CLONE_DIR, "push", "origin", `HEAD:${branch}`])
+        await run("git", [
+          "-C",
+          CLONE_DIR,
+          "push",
+          "origin",
+          `origin/${SYNC_SOURCE}:${branch}`,
+        ])
         console.log(`Successfully synced '${branch}' with '${SYNC_SOURCE}'`)
       }