$ git clone -n https://src.fedoraproject.org/rpms/python-sphinx.git /var/lib/mock/f40-build-1922736-25101/root/chroot_tmpdir/scmroot/python-sphinx
Cloning into '/var/lib/mock/f40-build-1922736-25101/root/chroot_tmpdir/scmroot/python-sphinx'...
$ git fetch origin 33d7e3b55b0028b7cbb391cd2fd5f5b67e49b5fc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-sphinx
 * [new ref]         33d7e3b55b0028b7cbb391cd2fd5f5b67e49b5fc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 33d7e3b Convert to %autorelease and %autochangelog