$ git clone -n https://src.fedoraproject.org/rpms/perl-CGI.git /var/lib/mock/f42-build-side-1-3584813-46896/root/chroot_tmpdir/scmroot/perl-CGI
Cloning into '/var/lib/mock/f42-build-side-1-3584813-46896/root/chroot_tmpdir/scmroot/perl-CGI'...
$ git fetch origin 8aa03f872d422e2070854e0d1f42e1388fc74eaf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-CGI
 * [new ref]         8aa03f872d422e2070854e0d1f42e1388fc74eaf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8aa03f8 4.69 bump (rhbz#2374269)