$ git clone -n https://src.fedoraproject.org/rpms/perl-Test-Warnings.git /var/lib/mock/f40-build-2309245-57339/root/chroot_tmpdir/scmroot/perl-Test-Warnings
Cloning into '/var/lib/mock/f40-build-2309245-57339/root/chroot_tmpdir/scmroot/perl-Test-Warnings'...
$ git fetch origin 1bb9fec1b30d3696bb8c3305c325e070ce4b4ff0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Test-Warnings
 * [new ref]         1bb9fec1b30d3696bb8c3305c325e070ce4b4ff0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1bb9fec Update to 0.033