$ git clone -n https://src.fedoraproject.org/rpms/fcitx5-qt.git /var/lib/mock/f41-build-847253-163867/root/chroot_tmpdir/scmroot/fcitx5-qt
Cloning into '/var/lib/mock/f41-build-847253-163867/root/chroot_tmpdir/scmroot/fcitx5-qt'...
$ git fetch origin 5c955b51d9947b479a483461fa8c21987aa859aa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fcitx5-qt
 * [new ref]         5c955b51d9947b479a483461fa8c21987aa859aa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5c955b5 Rebuild (qt5)