$ git clone -n https://src.fedoraproject.org/rpms/qt6-qtquicktimeline.git /var/lib/mock/f39-build-1789084-41735/root/chroot_tmpdir/scmroot/qt6-qtquicktimeline
Cloning into '/var/lib/mock/f39-build-1789084-41735/root/chroot_tmpdir/scmroot/qt6-qtquicktimeline'...
$ git fetch origin 25cca36d33deda2d9b7e2232c7afd755addbd047:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt6-qtquicktimeline
 * [new ref]         25cca36d33deda2d9b7e2232c7afd755addbd047 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 25cca36 6.6.0