$ git clone -n https://src.fedoraproject.org/rpms/qt6-qtbase.git /var/lib/mock/f42-build-868144-175945/root/chroot_tmpdir/scmroot/qt6-qtbase
Cloning into '/var/lib/mock/f42-build-868144-175945/root/chroot_tmpdir/scmroot/qt6-qtbase'...
$ git fetch origin 0eed16eaa6cf33545a210676cac0f06539238662:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt6-qtbase
 * [new ref]         0eed16eaa6cf33545a210676cac0f06539238662 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0eed16e Backport additional fixes for emoji support