$ git clone -n https://src.fedoraproject.org/rpms/ghc-doctemplates.git /var/lib/mock/f40-build-744827-111849/root/chroot_tmpdir/scmroot/ghc-doctemplates
Cloning into '/var/lib/mock/f40-build-744827-111849/root/chroot_tmpdir/scmroot/ghc-doctemplates'...
$ git fetch origin 6c3da42bcefda208e523774a32b3b2c826cf281e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-doctemplates
 * [new ref]         6c3da42bcefda208e523774a32b3b2c826cf281e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6c3da42 update to 0.11