$ git clone -n https://src.fedoraproject.org/rpms/fcitx5-qt.git /var/lib/mock/f40-build-754625-117900/root/chroot_tmpdir/scmroot/fcitx5-qt
Cloning into '/var/lib/mock/f40-build-754625-117900/root/chroot_tmpdir/scmroot/fcitx5-qt'...
$ git fetch origin 38e049a67f816436e7a9ad44ca9e574d4f2f9e13:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fcitx5-qt
 * [new ref]         38e049a67f816436e7a9ad44ca9e574d4f2f9e13 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 38e049a Rebuild (qt6)