$ git clone -n https://src.fedoraproject.org/rpms/python-qt5.git /var/lib/mock/f41-build-812289-147783/root/chroot_tmpdir/scmroot/python-qt5
Cloning into '/var/lib/mock/f41-build-812289-147783/root/chroot_tmpdir/scmroot/python-qt5'...
$ git fetch origin 4bb77b5a46c88ecb33623fc8aa1f04bd49f08099:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-qt5
 * [new ref]         4bb77b5a46c88ecb33623fc8aa1f04bd49f08099 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4bb77b5 Rebuild (qt5)