$ git clone -n https://src.fedoraproject.org/rpms/qt6-qtbase.git /var/lib/mock/f42-build-side-1-3539497-46565/root/chroot_tmpdir/scmroot/qt6-qtbase
Cloning into '/var/lib/mock/f42-build-side-1-3539497-46565/root/chroot_tmpdir/scmroot/qt6-qtbase'...
$ git fetch origin fe42bba4fc7c026bb7b9558fb936fdb502d8b414:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt6-qtbase
 * [new ref]         fe42bba4fc7c026bb7b9558fb936fdb502d8b414 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fe42bba 6.9.1