$ git clone -n https://src.fedoraproject.org/rpms/python-idna.git /var/lib/mock/f40-build-2634931-66039/root/chroot_tmpdir/scmroot/python-idna
Cloning into '/var/lib/mock/f40-build-2634931-66039/root/chroot_tmpdir/scmroot/python-idna'...
$ git fetch origin 30db7c30518621aa73f9b370afa4ed3b8780e61c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-idna
 * [new ref]         30db7c30518621aa73f9b370afa4ed3b8780e61c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 30db7c3 Convert to %autorelease and %autochangelog