$ git clone -n https://src.fedoraproject.org/rpms/qt6-qtbase.git /var/lib/mock/f42-build-3282654-41399/root/chroot_tmpdir/scmroot/qt6-qtbase
Cloning into '/var/lib/mock/f42-build-3282654-41399/root/chroot_tmpdir/scmroot/qt6-qtbase'...
$ git fetch origin c8038a82ef9f4ab0511d319f0ef807ac2eab7749:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt6-qtbase
 * [new ref]         c8038a82ef9f4ab0511d319f0ef807ac2eab7749 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c8038a8 Fix rendering of combined emojis