$ git clone -n https://src.fedoraproject.org/rpms/nodejs-packaging.git /var/lib/mock/f39-build-1492640-34531/root/chroot_tmpdir/scmroot/nodejs-packaging
Cloning into '/var/lib/mock/f39-build-1492640-34531/root/chroot_tmpdir/scmroot/nodejs-packaging'...
$ git fetch origin 9b4f2a673f2651f95df078a5143ee3ea8855de01:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/nodejs-packaging
 * [new ref]         9b4f2a673f2651f95df078a5143ee3ea8855de01 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9b4f2a6 Restrict autoprovides and requires to top-level