$ git clone -n https://src.fedoraproject.org/rpms/fcitx-qt5.git /var/lib/mock/f40-build-1931829-25123/root/chroot_tmpdir/scmroot/fcitx-qt5
Cloning into '/var/lib/mock/f40-build-1931829-25123/root/chroot_tmpdir/scmroot/fcitx-qt5'...
$ git fetch origin 7fe459e0893cb79b8e95d3ee7e6386d1f3e3c053:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fcitx-qt5
 * [new ref]         7fe459e0893cb79b8e95d3ee7e6386d1f3e3c053 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7fe459e Rebuild (qt5)