$ git clone -n https://src.fedoraproject.org/rpms/python-pymemcache.git /var/lib/mock/f40-build-2223098-52726/root/chroot_tmpdir/scmroot/python-pymemcache
Cloning into '/var/lib/mock/f40-build-2223098-52726/root/chroot_tmpdir/scmroot/python-pymemcache'...
$ git fetch origin dda247087bf4d6420e79b4ffa0de395454e68a9f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-pymemcache
 * [new ref]         dda247087bf4d6420e79b4ffa0de395454e68a9f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dda2470 Add automatic generated Python dependencies