$ git clone -n https://src.fedoraproject.org/rpms/puppet.git /var/lib/mock/f42-build-side-1-3499819-45966/root/chroot_tmpdir/scmroot/puppet
Cloning into '/var/lib/mock/f42-build-side-1-3499819-45966/root/chroot_tmpdir/scmroot/puppet'...
$ git fetch origin 2c952e70a2d53778a2764d59dc1a3600fb4fb87d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/puppet
 * [new ref]         2c952e70a2d53778a2764d59dc1a3600fb4fb87d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2c952e7 Update to 8.10.0