$ git clone -n https://src.fedoraproject.org/rpms/duplicity.git /var/lib/mock/f41-build-841761-161398/root/chroot_tmpdir/scmroot/duplicity
Cloning into '/var/lib/mock/f41-build-841761-161398/root/chroot_tmpdir/scmroot/duplicity'...
$ git fetch origin 372dc2c1c7a492effe5a0f81d6933dba7db7de11:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/duplicity
 * [new ref]         372dc2c1c7a492effe5a0f81d6933dba7db7de11 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 372dc2c 3.0.2