$ git clone -n https://src.fedoraproject.org/rpms/node-exporter.git /var/lib/mock/f40-build-1325749-23538/root/chroot_tmpdir/scmroot/node-exporter
Cloning into '/var/lib/mock/f40-build-1325749-23538/root/chroot_tmpdir/scmroot/node-exporter'...
$ git fetch origin dd26ceeaa5ebf3bda9de3ba7be9283d3bfc7b563:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/node-exporter
 * [new ref]         dd26ceeaa5ebf3bda9de3ba7be9283d3bfc7b563 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dd26cee Update to 1.8.1 - Closes rhbz#2282791