$ git clone -n https://src.fedoraproject.org/rpms/cups.git /var/lib/mock/f41-build-side-1-3132425-39650/root/chroot_tmpdir/scmroot/cups
Cloning into '/var/lib/mock/f41-build-side-1-3132425-39650/root/chroot_tmpdir/scmroot/cups'...
$ git fetch origin c7f151c26f097743250bafe84f12e6335a23d847:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cups
 * [new ref]         c7f151c26f097743250bafe84f12e6335a23d847 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c7f151c move /etc/cups/ssl into filesystem and make -libs require -filesystem