$ git clone -n https://src.fedoraproject.org/rpms/python-Traits.git /var/lib/mock/f40-build-730703-103596/root/chroot_tmpdir/scmroot/python-Traits
Cloning into '/var/lib/mock/f40-build-730703-103596/root/chroot_tmpdir/scmroot/python-Traits'...
$ git fetch origin 6f31e4bc1b271188869de5e3a9ff7daf91e7e15a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-Traits
 * [new ref]         6f31e4bc1b271188869de5e3a9ff7daf91e7e15a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6f31e4b Disable bootstrap