$ git clone -n https://src.fedoraproject.org/rpms/qt6-qtmultimedia.git /var/lib/mock/f40-build-2502541-61694/root/chroot_tmpdir/scmroot/qt6-qtmultimedia
Cloning into '/var/lib/mock/f40-build-2502541-61694/root/chroot_tmpdir/scmroot/qt6-qtmultimedia'...
$ git fetch origin 26b57b5af193eebd8487b97bfa0f7234dd90f468:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt6-qtmultimedia
 * [new ref]         26b57b5af193eebd8487b97bfa0f7234dd90f468 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 26b57b5 6.6.2