$ git clone -n https://src.fedoraproject.org/rpms/python-memcached.git /var/lib/mock/f45-build-31506-652/root/chroot_tmpdir/scmroot/python-memcached
Cloning into '/var/lib/mock/f45-build-31506-652/root/chroot_tmpdir/scmroot/python-memcached'...
$ git fetch origin 71c6acf5b02b5cdc4d8cfbb1fb630e41f13a2e44:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-memcached
 * [new ref]         71c6acf5b02b5cdc4d8cfbb1fb630e41f13a2e44 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 71c6acf Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild