$ git clone -n https://src.fedoraproject.org/rpms/python-pyvlx.git /var/lib/mock/f43-build-60990756-6587343/root/chroot_tmpdir/scmroot/python-pyvlx
Cloning into '/var/lib/mock/f43-build-60990756-6587343/root/chroot_tmpdir/scmroot/python-pyvlx'...
$ git fetch origin 3d607558351b2c48735b0b12d5bf7dca071a407e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-pyvlx
 * [new ref]         3d607558351b2c48735b0b12d5bf7dca071a407e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3d60755 Update to latest upstream release (closes rhbz#2327983)