$ git clone -n https://src.fedoraproject.org/rpms/kf5-kwindowsystem.git /var/lib/mock/f40-build-742071-110490/root/chroot_tmpdir/scmroot/kf5-kwindowsystem
Cloning into '/var/lib/mock/f40-build-742071-110490/root/chroot_tmpdir/scmroot/kf5-kwindowsystem'...
$ git fetch origin cd5d960ae6b24de2a2632ba9dfbefb49065e143c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf5-kwindowsystem
 * [new ref]         cd5d960ae6b24de2a2632ba9dfbefb49065e143c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cd5d960 5.111.0