$ git clone -n https://src.fedoraproject.org/rpms/nbdkit.git /var/lib/mock/f42-build-867562-175628/root/chroot_tmpdir/scmroot/nbdkit
Cloning into '/var/lib/mock/f42-build-867562-175628/root/chroot_tmpdir/scmroot/nbdkit'...
$ git fetch origin 29130e004ba3a000ac8755b1ae690c52e709b11b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/nbdkit
 * [new ref]         29130e004ba3a000ac8755b1ae690c52e709b11b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 29130e0 Ignore test results when built with merged-sbin