$ git clone -n https://src.fedoraproject.org/rpms/kf6-kwindowsystem.git /var/lib/mock/f40-build-1761411-24706/root/chroot_tmpdir/scmroot/kf6-kwindowsystem
Cloning into '/var/lib/mock/f40-build-1761411-24706/root/chroot_tmpdir/scmroot/kf6-kwindowsystem'...
$ git fetch origin 756ba030a45100d1a592788f712fb740459b8007:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-kwindowsystem
 * [new ref]         756ba030a45100d1a592788f712fb740459b8007 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 756ba03 Merge branch 'rawhide' into f40