$ git clone -n https://src.fedoraproject.org/rpms/qt6-qtdeclarative.git /var/lib/mock/f40-build-2204791-51970/root/chroot_tmpdir/scmroot/qt6-qtdeclarative
Cloning into '/var/lib/mock/f40-build-2204791-51970/root/chroot_tmpdir/scmroot/qt6-qtdeclarative'...
$ git fetch origin f7c90ff5a1a1f79734707f870006dbf3f72bbea3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt6-qtdeclarative
 * [new ref]         f7c90ff5a1a1f79734707f870006dbf3f72bbea3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f7c90ff 6.6.1