$ git clone -n https://src.fedoraproject.org/rpms/fcitx-qt5.git /var/lib/mock/f40-build-800479-143583/root/chroot_tmpdir/scmroot/fcitx-qt5
Cloning into '/var/lib/mock/f40-build-800479-143583/root/chroot_tmpdir/scmroot/fcitx-qt5'...
$ git fetch origin 216bdf63e6a47a95cae57c420ad9a9c0031d4087:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fcitx-qt5
 * [new ref]         216bdf63e6a47a95cae57c420ad9a9c0031d4087 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 216bdf6 Rebuild (qt5)