$ git clone -n https://src.fedoraproject.org/rpms/tachyon.git /var/lib/mock/f42-build-3367071-45050/root/chroot_tmpdir/scmroot/tachyon
Cloning into '/var/lib/mock/f42-build-3367071-45050/root/chroot_tmpdir/scmroot/tachyon'...
$ git fetch origin f472b426ecfe1f0cdf825ea840c594a7cf028e85:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/tachyon
 * [new ref]         f472b426ecfe1f0cdf825ea840c594a7cf028e85 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f472b42 ship an updated and better formatted manpage