$ git clone -n https://src.fedoraproject.org/rpms/perl-Class-Load-XS.git /var/lib/mock/f41-build-816572-150267/root/chroot_tmpdir/scmroot/perl-Class-Load-XS
Cloning into '/var/lib/mock/f41-build-816572-150267/root/chroot_tmpdir/scmroot/perl-Class-Load-XS'...
$ git fetch origin 970fa430418aebd50603c4820208816fd4eee52c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Class-Load-XS
 * [new ref]         970fa430418aebd50603c4820208816fd4eee52c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 970fa43 Perl 5.40 rebuild