$ git clone -n https://src.fedoraproject.org/rpms/wlcs.git /var/lib/mock/f40-build-2225279-52812/root/chroot_tmpdir/scmroot/wlcs
Cloning into '/var/lib/mock/f40-build-2225279-52812/root/chroot_tmpdir/scmroot/wlcs'...
$ git fetch origin b99314c5918c6cca291003e6115b3580ad0fd618:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/wlcs
 * [new ref]         b99314c5918c6cca291003e6115b3580ad0fd618 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b99314c Update to 1.7.0 (close RHBZ#2254812)