$ git clone -n https://src.fedoraproject.org/rpms/applet-window-buttons.git /var/lib/mock/f38-build-side-42-init-devel-566028-25898/root/chroot_tmpdir/scmroot/applet-window-buttons
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-566028-25898/root/chroot_tmpdir/scmroot/applet-window-buttons'...
$ git fetch origin b2c543784cf9aeecd3c9a047b40e405efdb149d8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/applet-window-buttons
 * [new ref]         b2c543784cf9aeecd3c9a047b40e405efdb149d8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b2c5437 Rebuilt for kde 5.26.90 library changes with upstream patch