$ git clone -n https://src.fedoraproject.org/rpms/R-affyio.git /var/lib/mock/f45-build-5962-345/root/chroot_tmpdir/scmroot/R-affyio
Cloning into '/var/lib/mock/f45-build-5962-345/root/chroot_tmpdir/scmroot/R-affyio'...
$ git fetch origin 56f636b52b8d8ca8fa647524549a3ccdc5b70f77:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-affyio
 * [new ref]         56f636b52b8d8ca8fa647524549a3ccdc5b70f77 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 56f636b 1.82.0