$ git clone -n https://src.fedoraproject.org/rpms/otf2.git /var/lib/mock/f40-build-2014293-45964/root/chroot_tmpdir/scmroot/otf2
Cloning into '/var/lib/mock/f40-build-2014293-45964/root/chroot_tmpdir/scmroot/otf2'...
$ git fetch origin 5676a97054d354cd251b61df5eedc23cfcbb42a9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/otf2
 * [new ref]         5676a97054d354cd251b61df5eedc23cfcbb42a9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5676a97 Remove runtime dependency on future