$ git clone -n https://src.fedoraproject.org/rpms/xwaylandvideobridge.git /var/lib/mock/f40-build-2216821-52516/root/chroot_tmpdir/scmroot/xwaylandvideobridge
Cloning into '/var/lib/mock/f40-build-2216821-52516/root/chroot_tmpdir/scmroot/xwaylandvideobridge'...
$ git fetch origin d7c43cda017d44667ab26bc0dbc8c97f15f11bcd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xwaylandvideobridge
 * [new ref]         d7c43cda017d44667ab26bc0dbc8c97f15f11bcd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d7c43cd 0.4.0