$ git clone -n https://src.fedoraproject.org/rpms/vokoscreenNG.git /var/lib/mock/f40-build-2272640-54931/root/chroot_tmpdir/scmroot/vokoscreenNG
Cloning into '/var/lib/mock/f40-build-2272640-54931/root/chroot_tmpdir/scmroot/vokoscreenNG'...
$ git fetch origin 59c3133167eba337e53a82c21eb51958d0351a33:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vokoscreenNG
 * [new ref]         59c3133167eba337e53a82c21eb51958d0351a33 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 59c3133 build: Update to 4.0.0 (rh#2256552)