$ git clone -n https://src.fedoraproject.org/rpms/highfive.git /var/lib/mock/f42-build-3398037-45118/root/chroot_tmpdir/scmroot/highfive
Cloning into '/var/lib/mock/f42-build-3398037-45118/root/chroot_tmpdir/scmroot/highfive'...
$ git fetch origin 1d16208ee3ac34fc3f6e58a70c27c4cf4cea4ece:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/highfive
 * [new ref]         1d16208ee3ac34fc3f6e58a70c27c4cf4cea4ece -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1d16208 Add dependencies to -devel package