$ git clone -n https://src.fedoraproject.org/rpms/vdr-skinnopacity.git /var/lib/mock/f40-build-2270946-54867/root/chroot_tmpdir/scmroot/vdr-skinnopacity
Cloning into '/var/lib/mock/f40-build-2270946-54867/root/chroot_tmpdir/scmroot/vdr-skinnopacity'...
$ git fetch origin eeffaa5ca123074c1ed5c4a73ce0f41f1764528d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vdr-skinnopacity
 * [new ref]         eeffaa5ca123074c1ed5c4a73ce0f41f1764528d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at eeffaa5 Rebuilt for new VDR API version