$ git clone -n https://src.fedoraproject.org/rpms/xdg-desktop-portal-kde.git /var/lib/mock/f42-build-880451-182797/root/chroot_tmpdir/scmroot/xdg-desktop-portal-kde
Cloning into '/var/lib/mock/f42-build-880451-182797/root/chroot_tmpdir/scmroot/xdg-desktop-portal-kde'...
$ git fetch origin 3dd129baafc50818fec17dda1f0c6d4f26ec23bd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xdg-desktop-portal-kde
 * [new ref]         3dd129baafc50818fec17dda1f0c6d4f26ec23bd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3dd129b 6.3.1