$ git clone -n https://src.fedoraproject.org/rpms/less.git /var/lib/mock/eln-build-side-114585-60923336-6585951/root/chroot_tmpdir/scmroot/less
Cloning into '/var/lib/mock/eln-build-side-114585-60923336-6585951/root/chroot_tmpdir/scmroot/less'...
$ git fetch origin e17c98717a328cc34e77da0065b9da7b7a14a8c1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/less
 * [new ref]         e17c98717a328cc34e77da0065b9da7b7a14a8c1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e17c987 updated to 679