$ git clone -n https://src.fedoraproject.org/rpms/qpid-dispatch.git /var/lib/mock/f40-build-2031213-47605/root/chroot_tmpdir/scmroot/qpid-dispatch
Cloning into '/var/lib/mock/f40-build-2031213-47605/root/chroot_tmpdir/scmroot/qpid-dispatch'...
$ git fetch origin bc216e98decc55ce3eb55ea6cda0d05fd1bbf9bc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qpid-dispatch
 * [new ref]         bc216e98decc55ce3eb55ea6cda0d05fd1bbf9bc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bc216e9 1.19.0-7