$ git clone -n https://src.fedoraproject.org/rpms/go-vendor-tools.git /var/lib/mock/f42-build-side-1-3502146-45977/root/chroot_tmpdir/scmroot/go-vendor-tools
Cloning into '/var/lib/mock/f42-build-side-1-3502146-45977/root/chroot_tmpdir/scmroot/go-vendor-tools'...
$ git fetch origin 10ef01d18d2d32fbbb9c7aaf82791a0eab189c4d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/go-vendor-tools
 * [new ref]         10ef01d18d2d32fbbb9c7aaf82791a0eab189c4d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 10ef01d Update to 0.7.0.