$ git clone -n https://src.fedoraproject.org/rpms/flatpak-kcm.git /var/lib/mock/f41-build-side-1-2893090-34614/root/chroot_tmpdir/scmroot/flatpak-kcm
Cloning into '/var/lib/mock/f41-build-side-1-2893090-34614/root/chroot_tmpdir/scmroot/flatpak-kcm'...
$ git fetch origin 36b8cb238366bc6bb61a928a11e812115fb2c593:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/flatpak-kcm
 * [new ref]         36b8cb238366bc6bb61a928a11e812115fb2c593 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 36b8cb2 6.2.0