$ git clone -n https://src.fedoraproject.org/rpms/apcupsd.git /var/lib/mock/f42-build-side-1-3537698-46560/root/chroot_tmpdir/scmroot/apcupsd
Cloning into '/var/lib/mock/f42-build-side-1-3537698-46560/root/chroot_tmpdir/scmroot/apcupsd'...
$ git fetch origin c2ac98a5855e73adaf38bded247acf6ffae8b530:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/apcupsd
 * [new ref]         c2ac98a5855e73adaf38bded247acf6ffae8b530 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c2ac98a Don't ship /usr/bin/smtp