$ git clone -n https://src.fedoraproject.org/rpms/vokoscreenNG.git /var/lib/mock/f42-build-61028632-6587875/root/chroot_tmpdir/scmroot/vokoscreenNG
Cloning into '/var/lib/mock/f42-build-61028632-6587875/root/chroot_tmpdir/scmroot/vokoscreenNG'...
$ git fetch origin 5f1e24c134c1722b654d97e88cd5e0da8ea5aa83:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vokoscreenNG
 * [new ref]         5f1e24c134c1722b654d97e88cd5e0da8ea5aa83 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5f1e24c Update to 4.6.0 upstream release