$ git clone -n https://src.fedoraproject.org/rpms/python-flask-login.git /var/lib/mock/f40-build-2203449-51923/root/chroot_tmpdir/scmroot/python-flask-login
Cloning into '/var/lib/mock/f40-build-2203449-51923/root/chroot_tmpdir/scmroot/python-flask-login'...
$ git fetch origin 23858c69f63cf6312c53e21e4753a51159c67907:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-flask-login
 * [new ref]         23858c69f63cf6312c53e21e4753a51159c67907 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 23858c6 Update to 0.6.3