$ git clone -n https://src.fedoraproject.org/rpms/qt6-qtmultimedia.git /var/lib/mock/f39-build-1512218-35561/root/chroot_tmpdir/scmroot/qt6-qtmultimedia
Cloning into '/var/lib/mock/f39-build-1512218-35561/root/chroot_tmpdir/scmroot/qt6-qtmultimedia'...
$ git fetch origin 6e3eefb04e2bf9551b6165f21ff6ba9b8d190a2d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt6-qtmultimedia
 * [new ref]         6e3eefb04e2bf9551b6165f21ff6ba9b8d190a2d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6e3eefb 6.6.0