$ git clone -n https://src.fedoraproject.org/rpms/python-chameleon.git /var/lib/mock/f40-build-2213528-52336/root/chroot_tmpdir/scmroot/python-chameleon
Cloning into '/var/lib/mock/f40-build-2213528-52336/root/chroot_tmpdir/scmroot/python-chameleon'...
$ git fetch origin 4d6bb6b2c8f591d93d8ff0ff5eb4c676659c029f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-chameleon
 * [new ref]         4d6bb6b2c8f591d93d8ff0ff5eb4c676659c029f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4d6bb6b Update to upstream.