$ git clone -n https://src.fedoraproject.org/rpms/perl-grpc-xs.git /var/lib/mock/f40-build-768567-125350/root/chroot_tmpdir/scmroot/perl-grpc-xs
Cloning into '/var/lib/mock/f40-build-768567-125350/root/chroot_tmpdir/scmroot/perl-grpc-xs'...
$ git fetch origin ee301f5765b239b3e011d55adde3ff3e0de43e0e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-grpc-xs
 * [new ref]         ee301f5765b239b3e011d55adde3ff3e0de43e0e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ee301f5 Update upstream URL