$ git clone -n https://src.fedoraproject.org/rpms/vdr-skinnopacity.git /var/lib/mock/f40-build-2117128-50721/root/chroot_tmpdir/scmroot/vdr-skinnopacity
Cloning into '/var/lib/mock/f40-build-2117128-50721/root/chroot_tmpdir/scmroot/vdr-skinnopacity'...
$ git fetch origin 6df7a64c398b8e9bee171d21c41f698a73c52929:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vdr-skinnopacity
 * [new ref]         6df7a64c398b8e9bee171d21c41f698a73c52929 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6df7a64 Update to 1.1.16