$ git clone -n https://src.fedoraproject.org/rpms/python-qt5.git /var/lib/mock/f41-build-847313-163918/root/chroot_tmpdir/scmroot/python-qt5
Cloning into '/var/lib/mock/f41-build-847313-163918/root/chroot_tmpdir/scmroot/python-qt5'...
$ git fetch origin 097ba3d51ffbc7a30b129982a6e083d6a478aff5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-qt5
 * [new ref]         097ba3d51ffbc7a30b129982a6e083d6a478aff5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 097ba3d Rebuild (qt5)