$ git clone -n https://src.fedoraproject.org/rpms/python-attrs.git /var/lib/mock/f40-build-2258031-54336/root/chroot_tmpdir/scmroot/python-attrs
Cloning into '/var/lib/mock/f40-build-2258031-54336/root/chroot_tmpdir/scmroot/python-attrs'...
$ git fetch origin ae3a70f7bcd28b8290ffa27e7122c819ffcd42c0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-attrs
 * [new ref]         ae3a70f7bcd28b8290ffa27e7122c819ffcd42c0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ae3a70f Remove undesired/optional test dependency on pympler