$ git clone -n https://src.fedoraproject.org/rpms/node-exporter.git /var/lib/mock/f40-build-1778252-24804/root/chroot_tmpdir/scmroot/node-exporter
Cloning into '/var/lib/mock/f40-build-1778252-24804/root/chroot_tmpdir/scmroot/node-exporter'...
$ git fetch origin 6dfa905622d6c2d83d0baad234a789b3f0435150:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/node-exporter
 * [new ref]         6dfa905622d6c2d83d0baad234a789b3f0435150 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6dfa905 Update to 1.8.2 - Closes rhbz#2297753