$ git clone -n https://src.fedoraproject.org/rpms/dosfstools.git /var/lib/mock/f40-build-801844-143878/root/chroot_tmpdir/scmroot/dosfstools
Cloning into '/var/lib/mock/f40-build-801844-143878/root/chroot_tmpdir/scmroot/dosfstools'...
$ git fetch origin 8b881531b7360bfcdad0fa35386b3be9ce281428:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dosfstools
 * [new ref]         8b881531b7360bfcdad0fa35386b3be9ce281428 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8b88153 Don't ship ancient docs, run tests