$ git clone -n https://src.fedoraproject.org/rpms/wget2.git /var/lib/mock/f40-build-1768842-24748/root/chroot_tmpdir/scmroot/wget2
Cloning into '/var/lib/mock/f40-build-1768842-24748/root/chroot_tmpdir/scmroot/wget2'...
$ git fetch origin 2685e7829399c0914b03a79c774762d77c044c9b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/wget2
 * [new ref]         2685e7829399c0914b03a79c774762d77c044c9b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2685e78 Disable tcp fastopen as it is not well supported everywhere.