$ git clone -n https://src.fedoraproject.org/rpms/python-pynamodb.git /var/lib/mock/f40-build-1949322-25186/root/chroot_tmpdir/scmroot/python-pynamodb
Cloning into '/var/lib/mock/f40-build-1949322-25186/root/chroot_tmpdir/scmroot/python-pynamodb'...
$ git fetch origin bc2e442ad256329b5567f836905a905c66486b75:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-pynamodb
 * [new ref]         bc2e442ad256329b5567f836905a905c66486b75 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bc2e442 Update to 6.0.1 upstream release