$ git clone -n https://src.fedoraproject.org/rpms/python-CacheControl.git /var/lib/mock/f40-build-2203270-51913/root/chroot_tmpdir/scmroot/python-CacheControl
Cloning into '/var/lib/mock/f40-build-2203270-51913/root/chroot_tmpdir/scmroot/python-CacheControl'...
$ git fetch origin 649b61d469eb038ee2fc50e9488b2eaad6bb28bc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-CacheControl
 * [new ref]         649b61d469eb038ee2fc50e9488b2eaad6bb28bc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 649b61d Update to 0.13.1