$ git clone -n https://src.fedoraproject.org/rpms/python-reproject.git /var/lib/mock/f40-build-806485-145129/root/chroot_tmpdir/scmroot/python-reproject
Cloning into '/var/lib/mock/f40-build-806485-145129/root/chroot_tmpdir/scmroot/python-reproject'...
$ git fetch origin 5fff83ac3e8b8b918203ca46dfad969c3905141c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-reproject
 * [new ref]         5fff83ac3e8b8b918203ca46dfad969c3905141c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5fff83a Drop i686 arch